./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a --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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:19:01,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:19:01,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:19:01,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:19:01,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:19:01,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:19:01,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:19:01,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:19:01,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:19:01,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:19:01,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:19:01,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:19:01,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:19:01,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:19:01,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:19:01,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:19:01,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:19:01,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:19:01,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:19:01,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:19:01,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:19:01,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:19:01,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:19:01,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:19:01,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:19:01,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:19:01,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:19:01,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:19:01,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:19:01,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:19:01,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:19:01,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:19:01,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:19:01,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:19:01,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:19:01,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:19:01,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:19:01,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:19:01,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:19:01,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:19:01,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:19:01,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:19:01,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:19:01,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:19:01,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:19:01,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:19:01,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:19:01,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:19:01,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:19:01,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:19:01,554 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:19:01,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:19:01,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:19:01,556 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:19:01,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:19:01,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:19:01,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:19:01,557 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:19:01,557 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:19:01,557 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:19:01,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:19:01,558 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:19:01,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:19:01,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:19:01,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:19:01,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:19:01,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:19:01,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:19:01,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:19:01,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:19:01,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:19:01,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:19:01,561 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_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-11-21 16:19:01,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:19:01,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:19:01,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:19:01,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:19:01,863 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:19:01,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-11-21 16:19:04,840 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:19:05,118 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:19:05,131 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-11-21 16:19:05,143 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/da6bbabd2/230549400f9e4b0d8c0cf0dc02989311/FLAGbb58c0898 [2022-11-21 16:19:05,166 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/da6bbabd2/230549400f9e4b0d8c0cf0dc02989311 [2022-11-21 16:19:05,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:19:05,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:19:05,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:19:05,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:19:05,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:19:05,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:19:05" (1/1) ... [2022-11-21 16:19:05,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502b9e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:05, skipping insertion in model container [2022-11-21 16:19:05,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:19:05" (1/1) ... [2022-11-21 16:19:05,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:19:05,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:19:05,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:19:05,746 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-21 16:19:05,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77cb5990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:05, skipping insertion in model container [2022-11-21 16:19:05,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:19:05,748 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-21 16:19:05,750 INFO L158 Benchmark]: Toolchain (without parser) took 576.24ms. Allocated memory is still 184.5MB. Free memory was 139.4MB in the beginning and 125.4MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-21 16:19:05,751 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory was 87.1MB in the beginning and 86.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:19:05,752 INFO L158 Benchmark]: CACSL2BoogieTranslator took 572.50ms. Allocated memory is still 184.5MB. Free memory was 138.9MB in the beginning and 125.4MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-21 16:19:05,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory was 87.1MB in the beginning and 86.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 572.50ms. Allocated memory is still 184.5MB. Free memory was 138.9MB in the beginning and 125.4MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. 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 of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a --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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:19:08,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:19:08,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:19:08,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:19:08,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:19:08,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:19:08,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:19:08,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:19:08,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:19:08,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:19:08,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:19:08,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:19:08,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:19:08,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:19:08,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:19:08,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:19:08,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:19:08,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:19:08,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:19:08,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:19:08,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:19:08,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:19:08,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:19:08,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:19:08,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:19:08,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:19:08,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:19:08,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:19:08,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:19:08,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:19:08,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:19:08,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:19:08,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:19:08,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:19:08,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:19:08,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:19:08,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:19:08,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:19:08,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:19:08,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:19:08,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:19:08,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 16:19:08,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:19:08,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:19:08,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:19:08,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:19:08,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:19:08,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:19:08,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:19:08,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:19:08,189 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:19:08,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:19:08,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:19:08,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:19:08,191 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:19:08,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:19:08,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:19:08,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 16:19:08,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 16:19:08,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:19:08,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:19:08,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:19:08,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:19:08,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:19:08,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:19:08,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:19:08,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:19:08,194 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 16:19:08,194 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:08,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 16:19:08,195 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_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-11-21 16:19:08,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:19:08,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:19:08,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:19:08,616 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:19:08,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:19:08,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-11-21 16:19:11,743 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:19:11,987 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:19:11,988 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-11-21 16:19:12,001 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/c454e72ca/a84ee71a472e48f2a4e38adb910d3cbd/FLAG97b406a77 [2022-11-21 16:19:12,020 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/data/c454e72ca/a84ee71a472e48f2a4e38adb910d3cbd [2022-11-21 16:19:12,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:19:12,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:19:12,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:19:12,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:19:12,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:19:12,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6466b47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12, skipping insertion in model container [2022-11-21 16:19:12,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:19:12,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:19:12,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:19:12,570 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-21 16:19:12,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:19:12,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:19:12,668 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:19:12,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:19:12,745 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:19:12,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12 WrapperNode [2022-11-21 16:19:12,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:19:12,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:19:12,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:19:12,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:19:12,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,808 INFO L138 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 52 [2022-11-21 16:19:12,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:19:12,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:19:12,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:19:12,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:19:12,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:19:12,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:19:12,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:19:12,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:19:12,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (1/1) ... [2022-11-21 16:19:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:19:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:12,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:19:12,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:19:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-21 16:19:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-21 16:19:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:19:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:19:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:19:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:19:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:19:12,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 16:19:12,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:19:12,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:19:13,055 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:19:13,057 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:19:13,354 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:19:13,360 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:19:13,361 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:19:13,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:19:13 BoogieIcfgContainer [2022-11-21 16:19:13,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:19:13,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:19:13,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:19:13,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:19:13,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:19:12" (1/3) ... [2022-11-21 16:19:13,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef39894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:19:13, skipping insertion in model container [2022-11-21 16:19:13,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:19:12" (2/3) ... [2022-11-21 16:19:13,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef39894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:19:13, skipping insertion in model container [2022-11-21 16:19:13,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:19:13" (3/3) ... [2022-11-21 16:19:13,388 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18.i [2022-11-21 16:19:13,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:19:13,408 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-21 16:19:13,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:19:13,486 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e548592, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:19:13,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-21 16:19:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:19:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:19:13,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:13,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:13,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1121278797, now seen corresponding path program 1 times [2022-11-21 16:19:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898089131] [2022-11-21 16:19:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:13,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:13,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:13,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:13,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-21 16:19:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:13,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:19:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:13,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:13,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898089131] [2022-11-21 16:19:13,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898089131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:13,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:13,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:19:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376210384] [2022-11-21 16:19:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:13,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:19:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:19:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:19:13,871 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-11-21 16:19:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:14,055 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-11-21 16:19:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:19:14,058 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 [2022-11-21 16:19:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:14,067 INFO L225 Difference]: With dead ends: 74 [2022-11-21 16:19:14,067 INFO L226 Difference]: Without dead ends: 70 [2022-11-21 16:19:14,068 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:19:14,072 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:19:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-21 16:19:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-11-21 16:19:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 16:19:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-21 16:19:14,115 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2022-11-21 16:19:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:14,117 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-21 16:19:14,117 INFO L496 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) [2022-11-21 16:19:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-21 16:19:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:19:14,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:14,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:14,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:14,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:14,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2008782478, now seen corresponding path program 1 times [2022-11-21 16:19:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239002872] [2022-11-21 16:19:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:14,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:14,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-21 16:19:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:19:14,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:14,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:14,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:14,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239002872] [2022-11-21 16:19:14,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239002872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:14,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:14,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:19:14,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389834187] [2022-11-21 16:19:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:19:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:19:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:19:14,454 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2022-11-21 16:19:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:14,573 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-21 16:19:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:19:14,576 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 [2022-11-21 16:19:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:14,577 INFO L225 Difference]: With dead ends: 69 [2022-11-21 16:19:14,577 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 16:19:14,578 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:19:14,579 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:14,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:19:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 16:19:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2022-11-21 16:19:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:19:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-21 16:19:14,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 11 [2022-11-21 16:19:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:14,589 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-21 16:19:14,590 INFO L496 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) [2022-11-21 16:19:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-21 16:19:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:19:14,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:14,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:14,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:14,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash -539289096, now seen corresponding path program 1 times [2022-11-21 16:19:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:14,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086224612] [2022-11-21 16:19:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:14,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:14,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-21 16:19:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:19:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:14,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:14,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:14,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086224612] [2022-11-21 16:19:14,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086224612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:14,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:14,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:19:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456215622] [2022-11-21 16:19:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:14,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:19:14,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:19:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:19:14,952 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:19:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:15,021 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-21 16:19:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:19:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-21 16:19:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:15,023 INFO L225 Difference]: With dead ends: 67 [2022-11-21 16:19:15,023 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 16:19:15,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:19:15,025 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:15,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:19:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 16:19:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-11-21 16:19:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:19:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-11-21 16:19:15,031 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2022-11-21 16:19:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:15,031 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-11-21 16:19:15,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 16:19:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-11-21 16:19:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:19:15,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:15,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:15,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:15,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978464, now seen corresponding path program 1 times [2022-11-21 16:19:15,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:15,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652754867] [2022-11-21 16:19:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:15,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:15,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-21 16:19:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:19:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:15,362 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:19:15,431 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_10 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_10))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-21 16:19:15,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 16:19:15,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 16:19:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 16:19:15,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:15,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:15,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652754867] [2022-11-21 16:19:15,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652754867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:15,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:15,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-21 16:19:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210426719] [2022-11-21 16:19:15,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:19:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:19:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2022-11-21 16:19:15,797 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-21 16:19:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:16,067 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-11-21 16:19:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:19:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 18 [2022-11-21 16:19:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:16,068 INFO L225 Difference]: With dead ends: 58 [2022-11-21 16:19:16,068 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 16:19:16,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2022-11-21 16:19:16,070 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:16,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 126 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-11-21 16:19:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 16:19:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-11-21 16:19:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 48 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-21 16:19:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-11-21 16:19:16,076 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 18 [2022-11-21 16:19:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:16,076 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-11-21 16:19:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-21 16:19:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-11-21 16:19:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:19:16,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:16,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:16,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:16,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:16,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978465, now seen corresponding path program 1 times [2022-11-21 16:19:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000088123] [2022-11-21 16:19:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:16,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:16,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-21 16:19:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:19:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:16,399 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:19:16,407 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:16,665 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_21 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_21) |c_#length|)))) is different from true [2022-11-21 16:19:16,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:16,743 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:16,761 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:16,762 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 16:19:16,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:17,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000088123] [2022-11-21 16:19:17,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000088123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710748151] [2022-11-21 16:19:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:19:17,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:19:17,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-21 16:19:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:19:17,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:17,453 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:17,459 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:19:17,545 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_31 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_31) |c_#length|)))) is different from true [2022-11-21 16:19:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:17,573 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:17,583 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:17,583 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 16:19:17,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:17,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710748151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:17,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:17,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-11-21 16:19:17,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949039558] [2022-11-21 16:19:17,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:17,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:19:17,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:19:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=108, Unknown=2, NotChecked=42, Total=182 [2022-11-21 16:19:17,901 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:19:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:18,669 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-11-21 16:19:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:19:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2022-11-21 16:19:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:18,672 INFO L225 Difference]: With dead ends: 116 [2022-11-21 16:19:18,672 INFO L226 Difference]: Without dead ends: 116 [2022-11-21 16:19:18,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=251, Unknown=2, NotChecked=66, Total=380 [2022-11-21 16:19:18,673 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:18,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 199 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 356 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-11-21 16:19:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-21 16:19:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2022-11-21 16:19:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 69 states have internal predecessors, (92), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-21 16:19:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2022-11-21 16:19:18,682 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 18 [2022-11-21 16:19:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:18,682 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2022-11-21 16:19:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:19:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2022-11-21 16:19:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:19:18,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:18,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:18,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:18,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:19,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 594419839, now seen corresponding path program 1 times [2022-11-21 16:19:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:19,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578490711] [2022-11-21 16:19:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:19,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:19,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-21 16:19:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:19:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:19,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:19,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578490711] [2022-11-21 16:19:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578490711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:19,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:19:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043319342] [2022-11-21 16:19:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:19,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:19:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:19:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:19:19,213 INFO L87 Difference]: Start difference. First operand 77 states and 107 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-21 16:19:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:19,265 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2022-11-21 16:19:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:19:19,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2022-11-21 16:19:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:19,268 INFO L225 Difference]: With dead ends: 70 [2022-11-21 16:19:19,268 INFO L226 Difference]: Without dead ends: 68 [2022-11-21 16:19:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:19:19,269 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:19:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-21 16:19:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-21 16:19:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 62 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:19:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2022-11-21 16:19:19,276 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 18 [2022-11-21 16:19:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:19,276 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2022-11-21 16:19:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-21 16:19:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2022-11-21 16:19:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:19:19,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:19,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:19,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:19,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:19,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash 517297676, now seen corresponding path program 1 times [2022-11-21 16:19:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:19,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982118542] [2022-11-21 16:19:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:19,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:19,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:19,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:19,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-21 16:19:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:19:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:19,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:19,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982118542] [2022-11-21 16:19:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982118542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:19,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:19,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:19:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674483731] [2022-11-21 16:19:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:19,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:19:19,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:19:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:19:19,579 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (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) [2022-11-21 16:19:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:19,631 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2022-11-21 16:19:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:19:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (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 [2022-11-21 16:19:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:19,635 INFO L225 Difference]: With dead ends: 113 [2022-11-21 16:19:19,635 INFO L226 Difference]: Without dead ends: 113 [2022-11-21 16:19:19,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:19:19,636 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:19,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:19:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-21 16:19:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2022-11-21 16:19:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 64 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:19:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2022-11-21 16:19:19,651 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 20 [2022-11-21 16:19:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:19,652 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2022-11-21 16:19:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (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) [2022-11-21 16:19:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2022-11-21 16:19:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:19:19,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:19,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:19,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:19,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2034859285, now seen corresponding path program 1 times [2022-11-21 16:19:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284071565] [2022-11-21 16:19:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:19,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:19,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:19,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:19,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-21 16:19:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:19:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:19:19,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:19:19,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284071565] [2022-11-21 16:19:19,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284071565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:19:19,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:19:19,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:19:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692866691] [2022-11-21 16:19:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:19:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:19:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:19:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:19:19,969 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:19:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:20,041 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2022-11-21 16:19:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:19:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-11-21 16:19:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:20,043 INFO L225 Difference]: With dead ends: 72 [2022-11-21 16:19:20,043 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 16:19:20,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:19:20,044 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:20,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:19:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 16:19:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-11-21 16:19:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:19:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-21 16:19:20,049 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 20 [2022-11-21 16:19:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:20,049 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-21 16:19:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:19:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-21 16:19:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:19:20,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:20,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:20,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:20,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:20,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1343870148, now seen corresponding path program 1 times [2022-11-21 16:19:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142735846] [2022-11-21 16:19:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:20,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:20,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-21 16:19:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:19:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:20,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:20,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:20,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142735846] [2022-11-21 16:19:20,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142735846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:20,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:20,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-21 16:19:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750623884] [2022-11-21 16:19:20,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:20,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:19:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:19:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:19:20,645 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-11-21 16:19:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:20,831 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-11-21 16:19:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:19:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 21 [2022-11-21 16:19:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:20,833 INFO L225 Difference]: With dead ends: 67 [2022-11-21 16:19:20,833 INFO L226 Difference]: Without dead ends: 65 [2022-11-21 16:19:20,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:19:20,834 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:20,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:19:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-21 16:19:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-21 16:19:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.4) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:19:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-11-21 16:19:20,839 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 21 [2022-11-21 16:19:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:20,839 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-11-21 16:19:20,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-11-21 16:19:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-11-21 16:19:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:19:20,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:20,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:20,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:21,047 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2006472631, now seen corresponding path program 1 times [2022-11-21 16:19:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76453461] [2022-11-21 16:19:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:21,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:21,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:21,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-21 16:19:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:19:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:19:21,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:19:21,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76453461] [2022-11-21 16:19:21,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76453461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:21,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:21,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 16:19:21,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243688667] [2022-11-21 16:19:21,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:19:21,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:19:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:19:21,262 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-11-21 16:19:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:21,423 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-11-21 16:19:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:19:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) Word has length 23 [2022-11-21 16:19:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:21,425 INFO L225 Difference]: With dead ends: 181 [2022-11-21 16:19:21,425 INFO L226 Difference]: Without dead ends: 181 [2022-11-21 16:19:21,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:19:21,426 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 199 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:21,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 189 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:19:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-21 16:19:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 92. [2022-11-21 16:19:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.364864864864865) internal successors, (101), 78 states have internal predecessors, (101), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-21 16:19:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2022-11-21 16:19:21,459 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 23 [2022-11-21 16:19:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:21,459 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2022-11-21 16:19:21,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-11-21 16:19:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2022-11-21 16:19:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:19:21,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:21,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:21,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:21,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1845507550, now seen corresponding path program 1 times [2022-11-21 16:19:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260017942] [2022-11-21 16:19:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:21,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:21,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:21,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-21 16:19:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:19:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:21,927 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-11-21 16:19:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:21,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:22,054 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_21| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_21|))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_21| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-21 16:19:22,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260017942] [2022-11-21 16:19:22,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260017942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608903322] [2022-11-21 16:19:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:22,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:19:22,057 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:19:22,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-21 16:19:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:19:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:22,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:22,537 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_24| (_ BitVec 32))) (or (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_24| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_24|))))) is different from false [2022-11-21 16:19:22,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608903322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:22,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:22,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-21 16:19:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976846184] [2022-11-21 16:19:22,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:22,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:19:22,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:19:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=126, Unknown=3, NotChecked=72, Total=240 [2022-11-21 16:19:22,541 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-11-21 16:19:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:22,981 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2022-11-21 16:19:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:19:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 24 [2022-11-21 16:19:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:22,983 INFO L225 Difference]: With dead ends: 129 [2022-11-21 16:19:22,983 INFO L226 Difference]: Without dead ends: 122 [2022-11-21 16:19:22,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=276, Unknown=3, NotChecked=108, Total=462 [2022-11-21 16:19:22,984 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:22,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 154 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 142 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-21 16:19:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-21 16:19:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-11-21 16:19:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.358695652173913) internal successors, (125), 96 states have internal predecessors, (125), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-21 16:19:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 154 transitions. [2022-11-21 16:19:22,992 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 154 transitions. Word has length 24 [2022-11-21 16:19:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:22,992 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 154 transitions. [2022-11-21 16:19:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-11-21 16:19:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 154 transitions. [2022-11-21 16:19:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:19:22,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:22,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:23,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:23,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:23,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:23,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2918772, now seen corresponding path program 1 times [2022-11-21 16:19:23,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341552325] [2022-11-21 16:19:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:23,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:23,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:23,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:23,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-21 16:19:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:19:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:23,570 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:19:23,576 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:23,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_85 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_85) |c_#length|)))) is different from true [2022-11-21 16:19:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:23,786 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:23,803 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:23,803 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:23,933 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_86 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_86) |c_#length|)))) is different from true [2022-11-21 16:19:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:23,965 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:23,976 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:23,976 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-21 16:19:24,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:26,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341552325] [2022-11-21 16:19:26,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341552325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450187738] [2022-11-21 16:19:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:19:26,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:19:26,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-21 16:19:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:19:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:26,631 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:26,637 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:19:26,741 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_104 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_104) |c_#length|)))) is different from true [2022-11-21 16:19:26,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:26,773 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:26,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:26,792 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:26,886 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_105 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_105) |c_#length|)))) is different from true [2022-11-21 16:19:26,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:26,910 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:26,927 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:19:26,928 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:19:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-11-21 16:19:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:28,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450187738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:28,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:28,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2022-11-21 16:19:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740801314] [2022-11-21 16:19:28,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:28,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:19:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:19:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=150, Unknown=5, NotChecked=108, Total=306 [2022-11-21 16:19:28,274 INFO L87 Difference]: Start difference. First operand 113 states and 154 transitions. Second operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-21 16:19:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:29,192 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-11-21 16:19:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:19:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-11-21 16:19:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:29,194 INFO L225 Difference]: With dead ends: 163 [2022-11-21 16:19:29,194 INFO L226 Difference]: Without dead ends: 163 [2022-11-21 16:19:29,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=89, Invalid=384, Unknown=5, NotChecked=172, Total=650 [2022-11-21 16:19:29,195 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 149 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:29,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 186 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 334 Invalid, 0 Unknown, 323 Unchecked, 0.6s Time] [2022-11-21 16:19:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-21 16:19:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2022-11-21 16:19:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 103 states have internal predecessors, (136), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-21 16:19:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2022-11-21 16:19:29,204 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 28 [2022-11-21 16:19:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:29,204 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2022-11-21 16:19:29,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-21 16:19:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2022-11-21 16:19:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 16:19:29,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:29,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:29,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:29,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:19:29,618 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash 252730558, now seen corresponding path program 1 times [2022-11-21 16:19:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270365940] [2022-11-21 16:19:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:29,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:29,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-21 16:19:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:19:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:30,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-21 16:19:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:19:30,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:30,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270365940] [2022-11-21 16:19:30,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270365940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:30,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:30,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-21 16:19:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008809790] [2022-11-21 16:19:30,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:30,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:19:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:19:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:19:30,836 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 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) [2022-11-21 16:19:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:33,386 INFO L93 Difference]: Finished difference Result 183 states and 218 transitions. [2022-11-21 16:19:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:19:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 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 30 [2022-11-21 16:19:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:33,388 INFO L225 Difference]: With dead ends: 183 [2022-11-21 16:19:33,388 INFO L226 Difference]: Without dead ends: 183 [2022-11-21 16:19:33,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:19:33,390 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 160 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:33,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 335 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:19:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-21 16:19:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 94. [2022-11-21 16:19:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 79 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-21 16:19:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2022-11-21 16:19:33,397 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 30 [2022-11-21 16:19:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:33,397 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2022-11-21 16:19:33,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 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) [2022-11-21 16:19:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2022-11-21 16:19:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:19:33,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:33,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:33,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:33,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:33,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash -755287307, now seen corresponding path program 1 times [2022-11-21 16:19:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:33,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167852672] [2022-11-21 16:19:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:33,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:33,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-21 16:19:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:19:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:33,817 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:19:34,040 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:19:34,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:19:34,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167852672] [2022-11-21 16:19:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167852672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:34,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:34,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-21 16:19:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569931337] [2022-11-21 16:19:34,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:19:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:19:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:19:34,330 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:19:37,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:39,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:41,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:43,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:44,082 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2022-11-21 16:19:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:19:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-11-21 16:19:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:44,084 INFO L225 Difference]: With dead ends: 169 [2022-11-21 16:19:44,084 INFO L226 Difference]: Without dead ends: 169 [2022-11-21 16:19:44,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:19:44,086 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 361 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:44,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 200 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 465 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2022-11-21 16:19:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-21 16:19:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 101. [2022-11-21 16:19:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.271604938271605) internal successors, (103), 85 states have internal predecessors, (103), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-21 16:19:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2022-11-21 16:19:44,095 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 31 [2022-11-21 16:19:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:44,095 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2022-11-21 16:19:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:19:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2022-11-21 16:19:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:19:44,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:44,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:44,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-21 16:19:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:44,310 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:19:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1939069955, now seen corresponding path program 1 times [2022-11-21 16:19:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:19:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055531311] [2022-11-21 16:19:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:19:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:19:44,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:19:44,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-21 16:19:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:19:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:44,891 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:19:45,471 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:19:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:45,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:19:46,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:19:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055531311] [2022-11-21 16:19:46,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055531311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:46,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:19:46,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-11-21 16:19:46,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383859951] [2022-11-21 16:19:46,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:46,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:19:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:19:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:19:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:19:46,068 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 16:19:48,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:52,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:54,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:57,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:19:59,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:01,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:02,218 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2022-11-21 16:20:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:20:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-11-21 16:20:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:02,220 INFO L225 Difference]: With dead ends: 172 [2022-11-21 16:20:02,220 INFO L226 Difference]: Without dead ends: 172 [2022-11-21 16:20:02,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:20:02,222 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 352 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:02,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 182 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 593 Invalid, 6 Unknown, 0 Unchecked, 14.1s Time] [2022-11-21 16:20:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-21 16:20:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 108. [2022-11-21 16:20:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 91 states have internal predecessors, (109), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-21 16:20:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2022-11-21 16:20:02,228 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 32 [2022-11-21 16:20:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:02,229 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2022-11-21 16:20:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 16:20:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2022-11-21 16:20:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:20:02,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:02,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:02,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-21 16:20:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:02,442 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash 18373623, now seen corresponding path program 1 times [2022-11-21 16:20:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:02,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944514823] [2022-11-21 16:20:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:02,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:02,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:02,444 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:02,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-21 16:20:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:20:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:02,587 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:20:02,697 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:20:02,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:20:02,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-21 16:20:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:20:02,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:20:03,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944514823] [2022-11-21 16:20:03,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944514823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:03,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:20:03,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-11-21 16:20:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966832334] [2022-11-21 16:20:03,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:20:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:20:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:20:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:20:03,513 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:20:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:07,036 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2022-11-21 16:20:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:20:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2022-11-21 16:20:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:07,044 INFO L225 Difference]: With dead ends: 166 [2022-11-21 16:20:07,044 INFO L226 Difference]: Without dead ends: 166 [2022-11-21 16:20:07,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:20:07,046 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:07,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 409 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 16:20:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-21 16:20:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 131. [2022-11-21 16:20:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 112 states have internal predecessors, (136), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-21 16:20:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2022-11-21 16:20:07,054 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 33 [2022-11-21 16:20:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:07,054 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2022-11-21 16:20:07,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:20:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2022-11-21 16:20:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:20:07,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:07,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:07,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:07,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash 229724536, now seen corresponding path program 2 times [2022-11-21 16:20:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:07,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612816425] [2022-11-21 16:20:07,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:20:07,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:07,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:07,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-21 16:20:07,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:20:07,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:20:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:20:07,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:20:07,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612816425] [2022-11-21 16:20:07,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612816425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:20:07,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:20:07,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:20:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280657877] [2022-11-21 16:20:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:20:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:20:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:20:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:20:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:20:07,420 INFO L87 Difference]: Start difference. First operand 131 states and 165 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-11-21 16:20:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:07,462 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-11-21 16:20:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:20:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 33 [2022-11-21 16:20:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:07,464 INFO L225 Difference]: With dead ends: 115 [2022-11-21 16:20:07,464 INFO L226 Difference]: Without dead ends: 111 [2022-11-21 16:20:07,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:20:07,465 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:07,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:20:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-21 16:20:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2022-11-21 16:20:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 69 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:20:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-11-21 16:20:07,469 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 33 [2022-11-21 16:20:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-11-21 16:20:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-11-21 16:20:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-11-21 16:20:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 16:20:07,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:07,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:07,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:07,685 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1907841251, now seen corresponding path program 1 times [2022-11-21 16:20:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847937626] [2022-11-21 16:20:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:07,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:07,687 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:07,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-21 16:20:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:20:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:20:07,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:20:07,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847937626] [2022-11-21 16:20:07,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847937626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:07,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:20:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-21 16:20:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820568395] [2022-11-21 16:20:07,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:20:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:20:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:20:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:20:07,996 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 16:20:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:08,198 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-11-21 16:20:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:20:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-11-21 16:20:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:08,202 INFO L225 Difference]: With dead ends: 93 [2022-11-21 16:20:08,202 INFO L226 Difference]: Without dead ends: 93 [2022-11-21 16:20:08,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:20:08,203 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:08,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 194 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:20:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-21 16:20:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-11-21 16:20:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 75 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:20:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-11-21 16:20:08,207 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 36 [2022-11-21 16:20:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-11-21 16:20:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 16:20:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-11-21 16:20:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:20:08,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:08,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:08,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:08,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:08,415 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1443160135, now seen corresponding path program 2 times [2022-11-21 16:20:08,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:08,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538191678] [2022-11-21 16:20:08,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:20:08,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:08,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:08,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:08,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-21 16:20:08,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:20:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:20:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:08,558 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:08,570 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:20:08,817 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_198 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_198))))) is different from true [2022-11-21 16:20:08,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:08,847 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:08,869 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:08,870 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:09,057 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_199 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_199) |c_#length|)))) is different from true [2022-11-21 16:20:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:09,087 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:09,104 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:09,105 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:09,316 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_200 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_200) |c_#length|)))) is different from true [2022-11-21 16:20:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:09,349 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:09,366 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:09,366 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-21 16:20:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:10,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:10,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538191678] [2022-11-21 16:20:10,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538191678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:10,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557851095] [2022-11-21 16:20:10,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:20:10,097 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:20:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:20:10,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:20:10,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-21 16:20:10,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:20:10,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:20:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:20:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:10,311 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:20:10,318 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:10,421 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_226 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_226) |c_#length|)))) is different from true [2022-11-21 16:20:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:10,450 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:10,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:10,465 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:10,559 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_227 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_227) |c_#length|)))) is different from true [2022-11-21 16:20:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:10,581 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:10,597 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:10,598 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:10,710 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_228 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_228) |c_#length|)))) is different from true [2022-11-21 16:20:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:20:10,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:10,759 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:20:10,759 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:20:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-21 16:20:10,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557851095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:11,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:20:11,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2022-11-21 16:20:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146603089] [2022-11-21 16:20:11,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:20:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:20:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:20:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=202, Unknown=6, NotChecked=198, Total=462 [2022-11-21 16:20:11,170 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:20:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:12,541 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-11-21 16:20:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:20:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-21 16:20:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:12,542 INFO L225 Difference]: With dead ends: 134 [2022-11-21 16:20:12,543 INFO L226 Difference]: Without dead ends: 134 [2022-11-21 16:20:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=551, Unknown=6, NotChecked=318, Total=992 [2022-11-21 16:20:12,544 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 313 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 470 Invalid, 0 Unknown, 546 Unchecked, 0.9s Time] [2022-11-21 16:20:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-21 16:20:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2022-11-21 16:20:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 75 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:20:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-11-21 16:20:12,547 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 38 [2022-11-21 16:20:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:12,548 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-11-21 16:20:12,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 16:20:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-11-21 16:20:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:20:12,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:12,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:12,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:12,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-21 16:20:12,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:20:12,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash -515638253, now seen corresponding path program 1 times [2022-11-21 16:20:12,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:12,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492064416] [2022-11-21 16:20:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:12,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:12,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:12,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-21 16:20:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:20:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:13,092 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:20:13,343 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 16:20:13,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 16:20:13,486 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:20:13,660 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 5 [2022-11-21 16:20:17,918 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:17,981 INFO L350 Elim1Store]: Elim1 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 20 [2022-11-21 16:20:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:18,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:20:19,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492064416] [2022-11-21 16:20:19,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492064416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:20:19,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:20:19,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2022-11-21 16:20:19,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561273693] [2022-11-21 16:20:19,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:20:19,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:20:19,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:20:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:20:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=564, Unknown=1, NotChecked=0, Total=650 [2022-11-21 16:20:19,174 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 16:20:21,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:23,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:25,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:28,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:30,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:32,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:20:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:20:34,880 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2022-11-21 16:20:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:20:34,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-11-21 16:20:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:20:34,882 INFO L225 Difference]: With dead ends: 141 [2022-11-21 16:20:34,882 INFO L226 Difference]: Without dead ends: 141 [2022-11-21 16:20:34,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=278, Invalid=1791, Unknown=1, NotChecked=0, Total=2070 [2022-11-21 16:20:34,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 44 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:20:34,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 262 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 952 Invalid, 6 Unknown, 0 Unchecked, 13.9s Time] [2022-11-21 16:20:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-21 16:20:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 93. [2022-11-21 16:20:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 16:20:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-11-21 16:20:34,888 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 38 [2022-11-21 16:20:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:20:34,889 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-11-21 16:20:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 16:20:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-11-21 16:20:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:20:34,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:20:34,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:20:34,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-21 16:20:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:35,103 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:20:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:20:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1607118890, now seen corresponding path program 1 times [2022-11-21 16:20:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:20:35,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757054094] [2022-11-21 16:20:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:20:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:20:35,105 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:20:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-21 16:20:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:20:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:35,709 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:20:35,929 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-21 16:20:35,929 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 33 [2022-11-21 16:20:36,133 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:20:48,980 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_264 (_ BitVec 1)) (|v_ULTIMATE.start_entry_point_#t~mem42#1.base_15| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_264))) (and (= (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_15|) (_ bv0 1)) (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_15| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)))))))) is different from true [2022-11-21 16:20:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:20:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:20:56,108 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_62| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_62|) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_62| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))))) is different from false [2022-11-21 16:20:56,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:20:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757054094] [2022-11-21 16:20:56,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757054094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:20:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802164189] [2022-11-21 16:20:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:20:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:20:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:20:56,115 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:20:56,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-21 16:20:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:20:56,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:20:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:20:59,297 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:20:59,703 INFO L321 Elim1Store]: treesize reduction 24, result has 17.2 percent of original size [2022-11-21 16:20:59,703 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 36 [2022-11-21 16:21:00,041 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 21 [2022-11-21 16:21:00,692 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (v_ArrVal_264 (_ BitVec 1)) (|v_ULTIMATE.start_entry_point_#t~mem42#1.base_17| (_ BitVec 32))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_264))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_17| (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv1 1))) (= (store .cse0 |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_17|) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-11-21 16:21:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:21:00,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:01,938 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 21 [2022-11-21 16:21:17,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802164189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:17,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:17,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-21 16:21:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494248576] [2022-11-21 16:21:17,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:21:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:21:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1968, Unknown=16, NotChecked=276, Total=2450 [2022-11-21 16:21:17,951 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:21:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:25,940 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-11-21 16:21:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:21:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-11-21 16:21:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:25,942 INFO L225 Difference]: With dead ends: 98 [2022-11-21 16:21:25,942 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 16:21:25,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=358, Invalid=3298, Unknown=16, NotChecked=360, Total=4032 [2022-11-21 16:21:25,943 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:25,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 585 Invalid, 2 Unknown, 118 Unchecked, 1.8s Time] [2022-11-21 16:21:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 16:21:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-21 16:21:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 70 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-21 16:21:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-21 16:21:25,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 40 [2022-11-21 16:21:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:25,947 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-21 16:21:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:21:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-21 16:21:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 16:21:25,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:25,949 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:25,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:26,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:26,352 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:21:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1528456508, now seen corresponding path program 1 times [2022-11-21 16:21:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:21:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263384127] [2022-11-21 16:21:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:26,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:21:26,354 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:21:26,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-21 16:21:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:21:26,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:21:26,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:21:26,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:21:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263384127] [2022-11-21 16:21:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263384127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:26,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:26,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-21 16:21:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905992585] [2022-11-21 16:21:26,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:26,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:21:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:21:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:21:26,624 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:21:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:27,001 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2022-11-21 16:21:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:21:27,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2022-11-21 16:21:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:27,003 INFO L225 Difference]: With dead ends: 140 [2022-11-21 16:21:27,003 INFO L226 Difference]: Without dead ends: 140 [2022-11-21 16:21:27,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:21:27,004 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 261 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:27,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 175 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:21:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-21 16:21:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 91. [2022-11-21 16:21:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.178082191780822) internal successors, (86), 79 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-21 16:21:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-11-21 16:21:27,008 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 44 [2022-11-21 16:21:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:27,009 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-11-21 16:21:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:21:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-11-21 16:21:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:21:27,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:27,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:27,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-21 16:21:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:27,222 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:21:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1589564234, now seen corresponding path program 2 times [2022-11-21 16:21:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:21:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906760341] [2022-11-21 16:21:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:21:27,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:27,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:21:27,223 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:21:27,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-21 16:21:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:21:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:27,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:21:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:21:27,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:28,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-11-21 16:21:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:21:29,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:21:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906760341] [2022-11-21 16:21:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906760341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:29,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:29,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-21 16:21:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928192782] [2022-11-21 16:21:29,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:21:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:21:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:21:29,719 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-21 16:21:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:39,189 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-11-21 16:21:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:21:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-11-21 16:21:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:39,192 INFO L225 Difference]: With dead ends: 213 [2022-11-21 16:21:39,192 INFO L226 Difference]: Without dead ends: 213 [2022-11-21 16:21:39,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:21:39,194 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 636 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:39,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 313 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 16:21:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-21 16:21:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 104. [2022-11-21 16:21:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.255813953488372) internal successors, (108), 92 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-21 16:21:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-11-21 16:21:39,199 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 46 [2022-11-21 16:21:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:39,199 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-11-21 16:21:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-21 16:21:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-11-21 16:21:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:21:39,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:39,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:39,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:39,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:39,412 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:21:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash -899085478, now seen corresponding path program 3 times [2022-11-21 16:21:39,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:21:39,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315921535] [2022-11-21 16:21:39,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:21:39,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:39,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:21:39,414 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:21:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-21 16:21:39,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:21:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:39,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-21 16:21:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:39,664 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:21:39,672 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:39,891 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_362 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_362) |c_#length|)))) is different from true [2022-11-21 16:21:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:39,913 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:39,930 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:39,930 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:40,084 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_363 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_363) |c_#length|)))) is different from true [2022-11-21 16:21:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:40,109 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:40,125 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:40,125 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:40,296 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_364 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_364) |c_#length|)))) is different from true [2022-11-21 16:21:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:40,321 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:40,333 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:40,334 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:40,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_365 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_365))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-21 16:21:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:40,526 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:40,543 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:40,543 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 20 not checked. [2022-11-21 16:21:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:41,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:21:41,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315921535] [2022-11-21 16:21:41,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315921535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912460195] [2022-11-21 16:21:41,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:21:41,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:21:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:21:41,140 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:21:41,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-21 16:21:41,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:21:41,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:21:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-21 16:21:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:41,663 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:41,672 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:21:41,870 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:41,871 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:41,885 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:42,207 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:21:42,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 16:21:42,237 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:42,238 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:42,490 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_403 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_403) |c_#length|)))) is different from true [2022-11-21 16:21:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:42,512 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:42,528 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:42,529 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:42,626 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_404 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_404) |c_#length|)))) is different from true [2022-11-21 16:21:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:42,645 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:42,662 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:21:42,662 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:21:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 14 not checked. [2022-11-21 16:21:42,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912460195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:45,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 26 [2022-11-21 16:21:45,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323380742] [2022-11-21 16:21:45,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:45,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:21:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:21:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=441, Unknown=6, NotChecked=282, Total=812 [2022-11-21 16:21:45,052 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 27 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-21 16:21:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:47,282 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-21 16:21:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:21:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 48 [2022-11-21 16:21:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:47,284 INFO L225 Difference]: With dead ends: 169 [2022-11-21 16:21:47,284 INFO L226 Difference]: Without dead ends: 169 [2022-11-21 16:21:47,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=188, Invalid=1236, Unknown=6, NotChecked=462, Total=1892 [2022-11-21 16:21:47,285 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 200 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 27 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:47,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 432 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 892 Invalid, 9 Unknown, 720 Unchecked, 1.5s Time] [2022-11-21 16:21:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-21 16:21:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 108. [2022-11-21 16:21:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 89 states have (on average 1.247191011235955) internal successors, (111), 95 states have internal predecessors, (111), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:21:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2022-11-21 16:21:47,290 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 48 [2022-11-21 16:21:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:47,290 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2022-11-21 16:21:47,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-21 16:21:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2022-11-21 16:21:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:21:47,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:47,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:47,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-21 16:21:47,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:47,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:21:47,704 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:21:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2031851011, now seen corresponding path program 1 times [2022-11-21 16:21:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:21:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75228927] [2022-11-21 16:21:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:47,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:47,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:21:47,706 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:21:47,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-21 16:21:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:21:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:47,955 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:21:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:48,146 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2022-11-21 16:21:48,494 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:21:48,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:21:49,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:21:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75228927] [2022-11-21 16:21:49,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75228927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:49,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:49,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-11-21 16:21:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404551196] [2022-11-21 16:21:49,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:21:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:21:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:21:49,017 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:21:53,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:21:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:21:53,992 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2022-11-21 16:21:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:21:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-11-21 16:21:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:21:53,995 INFO L225 Difference]: With dead ends: 137 [2022-11-21 16:21:53,995 INFO L226 Difference]: Without dead ends: 137 [2022-11-21 16:21:53,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:21:53,996 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 406 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:21:53,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 237 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 607 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 16:21:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-21 16:21:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2022-11-21 16:21:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 96 states have internal predecessors, (111), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:21:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2022-11-21 16:21:54,001 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 47 [2022-11-21 16:21:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:21:54,001 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2022-11-21 16:21:54,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:21:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2022-11-21 16:21:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:21:54,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:21:54,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:54,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-21 16:21:54,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:54,211 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:21:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1437128181, now seen corresponding path program 1 times [2022-11-21 16:21:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:21:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610058462] [2022-11-21 16:21:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:21:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:21:54,213 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:21:54,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-21 16:21:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:21:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:54,508 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:21:54,770 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2022-11-21 16:21:55,234 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:21:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:21:55,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:21:55,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:21:55,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610058462] [2022-11-21 16:21:55,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610058462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:55,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:21:55,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-11-21 16:21:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026231539] [2022-11-21 16:21:55,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:21:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:21:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:21:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:21:55,976 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:21:58,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:22:04,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:22:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:05,390 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2022-11-21 16:22:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:22:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-11-21 16:22:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:05,392 INFO L225 Difference]: With dead ends: 135 [2022-11-21 16:22:05,392 INFO L226 Difference]: Without dead ends: 135 [2022-11-21 16:22:05,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:22:05,393 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 415 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:05,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 234 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 763 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-21 16:22:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-21 16:22:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 110. [2022-11-21 16:22:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 97 states have internal predecessors, (111), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:22:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-11-21 16:22:05,399 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 48 [2022-11-21 16:22:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:05,399 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-11-21 16:22:05,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:22:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-11-21 16:22:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:22:05,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:05,400 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:05,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-21 16:22:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:05,612 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:22:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1601300735, now seen corresponding path program 1 times [2022-11-21 16:22:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:22:05,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39814155] [2022-11-21 16:22:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:22:05,614 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:22:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-21 16:22:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:22:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:05,801 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:05,899 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:22:05,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:22:06,081 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:22:06,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-21 16:22:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:06,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-21 16:22:06,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:22:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:06,829 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:22:06,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:22:06,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:22:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:22:06,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:07,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:22:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39814155] [2022-11-21 16:22:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39814155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033985636] [2022-11-21 16:22:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:22:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:22:07,634 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:22:07,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-21 16:22:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 16:22:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:07,954 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:07,993 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:22:08,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:22:08,135 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:22:08,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-21 16:22:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-21 16:22:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:22:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:08,578 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:22:08,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:22:08,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:22:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:22:08,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:08,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033985636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:08,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:22:08,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2022-11-21 16:22:08,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14392944] [2022-11-21 16:22:08,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:08,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:22:08,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:22:08,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:22:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:22:08,890 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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) [2022-11-21 16:22:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:10,628 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2022-11-21 16:22:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:22:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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 49 [2022-11-21 16:22:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:10,632 INFO L225 Difference]: With dead ends: 110 [2022-11-21 16:22:10,632 INFO L226 Difference]: Without dead ends: 110 [2022-11-21 16:22:10,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:22:10,634 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:10,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 330 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 775 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 16:22:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-21 16:22:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-21 16:22:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 97 states have internal predecessors, (110), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:22:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-11-21 16:22:10,645 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 49 [2022-11-21 16:22:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:10,645 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-11-21 16:22:10,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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) [2022-11-21 16:22:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-11-21 16:22:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:22:10,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:10,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:10,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-21 16:22:10,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-21 16:22:11,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:22:11,065 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:22:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 148524762, now seen corresponding path program 1 times [2022-11-21 16:22:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:22:11,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271507852] [2022-11-21 16:22:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:22:11,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:22:11,067 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:22:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-21 16:22:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:22:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:22:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:22:11,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:22:11,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:22:11,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271507852] [2022-11-21 16:22:11,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271507852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:11,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:22:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-21 16:22:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436339760] [2022-11-21 16:22:11,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:11,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:22:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:22:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:22:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:22:11,561 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:22:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:11,869 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-11-21 16:22:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:22:11,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-11-21 16:22:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:11,871 INFO L225 Difference]: With dead ends: 110 [2022-11-21 16:22:11,871 INFO L226 Difference]: Without dead ends: 110 [2022-11-21 16:22:11,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:22:11,872 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 53 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:11,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 302 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:22:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-21 16:22:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2022-11-21 16:22:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 90 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:22:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-11-21 16:22:11,876 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 52 [2022-11-21 16:22:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:11,876 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-11-21 16:22:11,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:22:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-11-21 16:22:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:22:11,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:11,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:11,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-21 16:22:12,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:12,079 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:22:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 998331403, now seen corresponding path program 2 times [2022-11-21 16:22:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:22:12,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127477393] [2022-11-21 16:22:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:22:12,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:22:12,081 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:22:12,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-21 16:22:12,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:22:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:22:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:12,221 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:12,325 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:12,325 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:12,393 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:22:14,491 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|))) is different from true [2022-11-21 16:22:14,581 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 16:22:14,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-21 16:22:16,647 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|))) is different from true [2022-11-21 16:22:16,790 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:16,856 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:16,915 INFO L350 Elim1Store]: Elim1 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 20 [2022-11-21 16:22:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-11-21 16:22:16,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:17,246 INFO L350 Elim1Store]: Elim1 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 112 treesize of output 108 [2022-11-21 16:22:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:22:18,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:22:18,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127477393] [2022-11-21 16:22:18,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127477393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:22:18,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:22:18,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-11-21 16:22:18,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735554825] [2022-11-21 16:22:18,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:18,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:22:18,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:22:18,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:22:18,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=636, Unknown=2, NotChecked=102, Total=812 [2022-11-21 16:22:18,135 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 26 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:22:35,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:22:38,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:22:40,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:22:45,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:22:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:48,872 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-11-21 16:22:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-21 16:22:48,873 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 26 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-11-21 16:22:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:48,874 INFO L225 Difference]: With dead ends: 161 [2022-11-21 16:22:48,874 INFO L226 Difference]: Without dead ends: 161 [2022-11-21 16:22:48,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=596, Invalid=4378, Unknown=4, NotChecked=278, Total=5256 [2022-11-21 16:22:48,877 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 346 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 56 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:48,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 398 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1241 Invalid, 4 Unknown, 179 Unchecked, 11.1s Time] [2022-11-21 16:22:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-21 16:22:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 106. [2022-11-21 16:22:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.160919540229885) internal successors, (101), 93 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-21 16:22:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-11-21 16:22:48,882 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 54 [2022-11-21 16:22:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:48,882 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-11-21 16:22:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 26 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 16:22:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-11-21 16:22:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:22:48,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:48,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:48,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-21 16:22:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:49,095 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:22:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1999848787, now seen corresponding path program 4 times [2022-11-21 16:22:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:22:49,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784967258] [2022-11-21 16:22:49,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:22:49,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:49,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:22:49,097 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:22:49,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-21 16:22:49,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:22:49,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 16:22:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:49,292 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:49,298 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:49,506 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_592 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_592))))) is different from true [2022-11-21 16:22:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:49,524 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:49,541 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:49,541 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:49,703 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_593 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_593) |c_#length|)))) is different from true [2022-11-21 16:22:49,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:49,722 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:49,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:49,739 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:49,904 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_594 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_594) |c_#length|)))) is different from true [2022-11-21 16:22:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:49,935 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:49,948 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:49,948 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:50,122 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_595 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_595) |c_#length|)))) is different from true [2022-11-21 16:22:50,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:50,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:50,157 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:50,157 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:50,354 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_596 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_596) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-21 16:22:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:50,377 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:50,391 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:50,391 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 30 not checked. [2022-11-21 16:22:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:54,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:22:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784967258] [2022-11-21 16:22:54,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784967258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092652440] [2022-11-21 16:22:54,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:22:54,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:22:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:22:54,316 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:22:54,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-21 16:22:54,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:22:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 16:22:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:54,637 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:54,645 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:22:54,738 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_638 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_638) |c_#length|)))) is different from true [2022-11-21 16:22:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:54,765 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:54,785 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:54,785 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:54,884 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_639 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_639))))) is different from true [2022-11-21 16:22:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:54,908 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:54,924 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:54,924 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:55,019 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_640 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_640) |c_#length|)))) is different from true [2022-11-21 16:22:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:55,043 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:55,056 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:55,057 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:55,145 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_641 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_641) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-21 16:22:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:55,171 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:55,187 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:55,188 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:55,279 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_642 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_642) |c_#length|)))) is different from true [2022-11-21 16:22:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:22:55,301 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:22:55,318 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:22:55,319 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:22:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 30 not checked. [2022-11-21 16:22:55,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:22:55,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092652440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:22:55,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:22:55,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 27 [2022-11-21 16:22:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736948941] [2022-11-21 16:22:55,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:22:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:22:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:22:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:22:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=327, Unknown=11, NotChecked=450, Total=870 [2022-11-21 16:22:55,716 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-21 16:22:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:22:57,679 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2022-11-21 16:22:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:22:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-11-21 16:22:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:22:57,681 INFO L225 Difference]: With dead ends: 203 [2022-11-21 16:22:57,681 INFO L226 Difference]: Without dead ends: 203 [2022-11-21 16:22:57,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=173, Invalid=978, Unknown=11, NotChecked=730, Total=1892 [2022-11-21 16:22:57,682 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 232 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:22:57,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 476 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 725 Invalid, 0 Unknown, 1150 Unchecked, 1.2s Time] [2022-11-21 16:22:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-21 16:22:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 112. [2022-11-21 16:22:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 98 states have internal predecessors, (106), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-21 16:22:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2022-11-21 16:22:57,687 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 58 [2022-11-21 16:22:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:22:57,688 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2022-11-21 16:22:57,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-21 16:22:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2022-11-21 16:22:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:22:57,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:22:57,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:22:57,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-21 16:22:57,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-21 16:22:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:22:58,103 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:22:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:22:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1618774478, now seen corresponding path program 2 times [2022-11-21 16:22:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:22:58,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533975746] [2022-11-21 16:22:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:22:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:22:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:22:58,105 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:22:58,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-21 16:22:58,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:22:58,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:22:58,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-21 16:22:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:22:58,588 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:22:58,782 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-21 16:22:58,783 INFO L350 Elim1Store]: Elim1 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 15 [2022-11-21 16:23:09,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-21 16:23:09,629 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-21 16:23:09,629 INFO L350 Elim1Store]: Elim1 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 105 treesize of output 94 [2022-11-21 16:23:16,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:23:16,851 INFO L350 Elim1Store]: Elim1 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 63 treesize of output 35 [2022-11-21 16:23:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:23:24,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:39,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:23:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533975746] [2022-11-21 16:23:39,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533975746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [436471658] [2022-11-21 16:23:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:23:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:23:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:23:39,171 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:23:39,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-21 16:23:39,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:23:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:23:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 16:23:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:46,911 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:23:47,481 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-21 16:23:47,481 INFO L350 Elim1Store]: Elim1 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 18 [2022-11-21 16:23:56,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-21 16:23:56,721 INFO L321 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-11-21 16:23:56,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 45 [2022-11-21 16:23:58,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:23:58,841 INFO L350 Elim1Store]: Elim1 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 63 treesize of output 35 [2022-11-21 16:24:03,597 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|v_ULTIMATE.start_entry_point_#t~mem42#1.base_41| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (v_arrayElimCell_155 (_ BitVec 32))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_41| (_ bv1 1)))) (and (= (store (store (store .cse0 v_arrayElimCell_155 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem42#1.base_41| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_41|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (select .cse0 v_arrayElimCell_155))))))) is different from true [2022-11-21 16:24:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:24:03,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:24:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [436471658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:24:14,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:24:14,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2022-11-21 16:24:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763228520] [2022-11-21 16:24:14,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:24:14,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:24:14,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:24:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:24:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3322, Unknown=22, NotChecked=116, Total=3660 [2022-11-21 16:24:14,649 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 48 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 42 states have internal predecessors, (86), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:24:16,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:18,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:24,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:27,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:31,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:33,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:37,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:41,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:44,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:47,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:24:49,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:05,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:07,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:10,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:12,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:14,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:27,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:29,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:31,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:41,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:43,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:45,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:25:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:25:46,765 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-11-21 16:25:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:25:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 42 states have internal predecessors, (86), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2022-11-21 16:25:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:25:46,767 INFO L225 Difference]: With dead ends: 117 [2022-11-21 16:25:46,767 INFO L226 Difference]: Without dead ends: 94 [2022-11-21 16:25:46,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=424, Invalid=6855, Unknown=35, NotChecked=168, Total=7482 [2022-11-21 16:25:46,769 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 32 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 49.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:25:46,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 457 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1378 Invalid, 34 Unknown, 67 Unchecked, 49.5s Time] [2022-11-21 16:25:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-21 16:25:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-21 16:25:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.178082191780822) internal successors, (86), 80 states have internal predecessors, (86), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:25:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-21 16:25:46,773 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 56 [2022-11-21 16:25:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:25:46,773 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-21 16:25:46,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 42 states have internal predecessors, (86), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:25:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-21 16:25:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:25:46,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:25:46,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:46,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:46,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:25:47,179 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:25:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1837376524, now seen corresponding path program 2 times [2022-11-21 16:25:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:25:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439600532] [2022-11-21 16:25:47,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:25:47,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:25:47,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:25:47,181 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:25:47,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-21 16:25:47,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:25:47,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:25:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:47,476 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:25:47,582 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:25:47,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:25:47,843 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-21 16:25:47,843 INFO L350 Elim1Store]: Elim1 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 39 [2022-11-21 16:25:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:25:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-21 16:25:48,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:25:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:25:48,749 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 34 [2022-11-21 16:25:48,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:25:48,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:25:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:25:48,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:49,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:25:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439600532] [2022-11-21 16:25:49,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439600532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1862553093] [2022-11-21 16:25:49,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:25:49,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:25:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:25:49,833 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:25:49,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-21 16:25:50,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:25:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231728439] [2022-11-21 16:25:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:25:50,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 1 [2022-11-21 16:25:50,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:50,104 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:50,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-21 16:25:50,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:25:50,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:25:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:50,888 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:25:51,181 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:25:51,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:25:51,641 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-11-21 16:25:51,642 INFO L350 Elim1Store]: Elim1 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 45 [2022-11-21 16:25:52,037 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 35 [2022-11-21 16:25:52,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:25:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:25:52,881 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 34 [2022-11-21 16:25:52,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:25:52,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:25:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:25:52,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:54,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231728439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:54,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:25:54,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 35 [2022-11-21 16:25:54,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872276891] [2022-11-21 16:25:54,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:54,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:25:54,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:25:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:25:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:25:54,116 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:25:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:25:56,646 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-11-21 16:25:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:25:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2022-11-21 16:25:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:25:56,648 INFO L225 Difference]: With dead ends: 110 [2022-11-21 16:25:56,648 INFO L226 Difference]: Without dead ends: 110 [2022-11-21 16:25:56,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:25:56,650 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:25:56,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 357 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 894 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 16:25:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-21 16:25:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-21 16:25:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 96 states have internal predecessors, (104), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:25:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-11-21 16:25:56,654 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-11-21 16:25:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:25:56,654 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-11-21 16:25:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:25:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-11-21 16:25:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 16:25:56,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:25:56,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:56,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:56,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-21 16:25:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:57,076 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:25:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2074075986, now seen corresponding path program 3 times [2022-11-21 16:25:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:25:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962034582] [2022-11-21 16:25:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:25:57,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:25:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:25:57,078 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:25:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-21 16:25:57,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:25:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:25:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:26:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:26:01,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:26:06,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-21 16:26:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:26:09,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:26:09,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962034582] [2022-11-21 16:26:09,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962034582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:26:09,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:26:09,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-11-21 16:26:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026876128] [2022-11-21 16:26:09,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:26:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:26:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:26:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:26:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:26:09,334 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:26:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:26:46,753 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-11-21 16:26:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 16:26:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 62 [2022-11-21 16:26:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:26:46,757 INFO L225 Difference]: With dead ends: 167 [2022-11-21 16:26:46,757 INFO L226 Difference]: Without dead ends: 167 [2022-11-21 16:26:46,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1048, Invalid=3922, Unknown=0, NotChecked=0, Total=4970 [2022-11-21 16:26:46,759 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 826 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:26:46,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 454 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-21 16:26:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-21 16:26:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 111. [2022-11-21 16:26:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.164835164835165) internal successors, (106), 97 states have internal predecessors, (106), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:26:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-11-21 16:26:46,764 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 62 [2022-11-21 16:26:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:26:46,764 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-11-21 16:26:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:26:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-11-21 16:26:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 16:26:46,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:26:46,765 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:26:46,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-21 16:26:46,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:26:46,978 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:26:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2074075987, now seen corresponding path program 2 times [2022-11-21 16:26:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:26:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510614125] [2022-11-21 16:26:46,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:26:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:26:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:26:46,981 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:26:47,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-21 16:26:47,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:26:47,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:26:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:26:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:26:47,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:26:47,389 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:26:47,502 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:26:49,653 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_90| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_90|) (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_90|))) is different from true [2022-11-21 16:26:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:26:49,761 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 25 [2022-11-21 16:26:51,856 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_91| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_91|) (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_91|))) is different from true [2022-11-21 16:26:52,173 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:26:52,236 INFO L350 Elim1Store]: Elim1 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 20 [2022-11-21 16:26:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 16 not checked. [2022-11-21 16:26:52,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:26:52,369 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:26:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:26:53,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:26:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510614125] [2022-11-21 16:26:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510614125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:26:53,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:26:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2022-11-21 16:26:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687697315] [2022-11-21 16:26:53,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:26:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:26:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:26:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:26:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=631, Unknown=2, NotChecked=102, Total=812 [2022-11-21 16:26:53,170 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 29 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 26 states have internal predecessors, (83), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:27:14,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:27:16,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:27:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:19,922 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2022-11-21 16:27:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:27:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 26 states have internal predecessors, (83), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 62 [2022-11-21 16:27:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:19,925 INFO L225 Difference]: With dead ends: 191 [2022-11-21 16:27:19,925 INFO L226 Difference]: Without dead ends: 191 [2022-11-21 16:27:19,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=499, Invalid=3793, Unknown=6, NotChecked=258, Total=4556 [2022-11-21 16:27:19,926 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 424 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:19,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 488 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1371 Invalid, 2 Unknown, 233 Unchecked, 6.9s Time] [2022-11-21 16:27:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-21 16:27:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2022-11-21 16:27:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 102 states have internal predecessors, (109), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:27:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2022-11-21 16:27:19,933 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 62 [2022-11-21 16:27:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:19,934 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2022-11-21 16:27:19,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 26 states have internal predecessors, (83), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:27:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2022-11-21 16:27:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:27:19,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:19,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:19,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-21 16:27:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:27:20,149 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:27:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 128153861, now seen corresponding path program 2 times [2022-11-21 16:27:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:27:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672690892] [2022-11-21 16:27:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:27:20,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:27:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:27:20,151 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:27:20,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-21 16:27:20,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:27:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:27:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:20,520 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:27:20,754 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2022-11-21 16:27:20,958 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2022-11-21 16:27:21,476 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:27:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 16:27:21,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 16:27:22,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:27:22,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672690892] [2022-11-21 16:27:22,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672690892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:22,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:27:22,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2022-11-21 16:27:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517229535] [2022-11-21 16:27:22,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:27:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:27:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:27:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:27:22,843 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:27:28,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:27:30,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:27:32,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:27:35,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:27:37,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:27:43,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:27:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:27:49,796 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2022-11-21 16:27:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:27:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 63 [2022-11-21 16:27:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:27:49,798 INFO L225 Difference]: With dead ends: 307 [2022-11-21 16:27:49,798 INFO L226 Difference]: Without dead ends: 307 [2022-11-21 16:27:49,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2623 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1376, Invalid=6996, Unknown=0, NotChecked=0, Total=8372 [2022-11-21 16:27:49,800 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 978 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 57 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:27:49,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 406 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 995 Invalid, 6 Unknown, 0 Unchecked, 14.7s Time] [2022-11-21 16:27:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-21 16:27:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 145. [2022-11-21 16:27:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 129 states have internal predecessors, (151), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:27:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2022-11-21 16:27:49,805 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 63 [2022-11-21 16:27:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:27:49,806 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2022-11-21 16:27:49,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:27:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2022-11-21 16:27:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:27:49,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:27:49,807 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:27:49,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-21 16:27:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:27:50,023 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:27:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:27:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -322197523, now seen corresponding path program 2 times [2022-11-21 16:27:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:27:50,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063998886] [2022-11-21 16:27:50,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:27:50,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:27:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:27:50,025 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:27:50,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-21 16:27:50,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:27:50,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:27:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:27:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:27:50,479 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:27:50,807 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2022-11-21 16:27:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:27:51,064 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2022-11-21 16:27:51,750 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:27:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-21 16:27:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:27:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 16:27:53,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:27:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063998886] [2022-11-21 16:27:53,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063998886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:27:53,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:27:53,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2022-11-21 16:27:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207245473] [2022-11-21 16:27:53,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:27:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:27:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:27:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:27:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:27:53,677 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 28 states, 27 states have (on average 3.185185185185185) internal successors, (86), 25 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:28:01,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:03,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:05,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:08,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:28:10,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:28:16,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:20,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:25,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:31,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:35,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:28:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:36,004 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2022-11-21 16:28:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 16:28:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.185185185185185) internal successors, (86), 25 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 64 [2022-11-21 16:28:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:36,007 INFO L225 Difference]: With dead ends: 252 [2022-11-21 16:28:36,007 INFO L226 Difference]: Without dead ends: 252 [2022-11-21 16:28:36,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=1064, Invalid=5256, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:28:36,008 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 875 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 53 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 287 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1094 Invalid, 10 Unknown, 0 Unchecked, 24.4s Time] [2022-11-21 16:28:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-21 16:28:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 146. [2022-11-21 16:28:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.221311475409836) internal successors, (149), 130 states have internal predecessors, (149), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:28:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2022-11-21 16:28:36,013 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 64 [2022-11-21 16:28:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:36,013 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2022-11-21 16:28:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.185185185185185) internal successors, (86), 25 states have internal predecessors, (86), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 16:28:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2022-11-21 16:28:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 16:28:36,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:36,015 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:36,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-21 16:28:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:28:36,231 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:28:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1398188537, now seen corresponding path program 3 times [2022-11-21 16:28:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:28:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313760941] [2022-11-21 16:28:36,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:28:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:28:36,233 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:28:36,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-21 16:28:36,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:28:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 16:28:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:36,655 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:28:36,767 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:28:36,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:28:37,012 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:28:37,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-21 16:28:37,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:37,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-21 16:28:37,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:28:37,589 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:28:37,589 INFO L350 Elim1Store]: Elim1 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 35 [2022-11-21 16:28:37,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:37,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:28:37,887 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 49 treesize of output 43 [2022-11-21 16:28:38,159 INFO L350 Elim1Store]: Elim1 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 5 [2022-11-21 16:28:38,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:38,884 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:28:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:39,341 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:28:39,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:28:39,545 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 19 [2022-11-21 16:28:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:28:39,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:42,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:28:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313760941] [2022-11-21 16:28:42,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313760941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062994494] [2022-11-21 16:28:42,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:42,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:28:42,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:28:42,196 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:28:42,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-21 16:28:42,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:28:42,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331835754] [2022-11-21 16:28:42,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:42,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:42,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:42,554 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:42,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 1 [2022-11-21 16:28:42,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-21 16:28:42,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:28:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-21 16:28:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:43,243 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:28:43,550 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:28:43,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:28:43,975 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:28:43,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-21 16:28:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:44,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-21 16:28:44,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:28:45,024 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-21 16:28:45,024 INFO L350 Elim1Store]: Elim1 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 35 [2022-11-21 16:28:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:45,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:28:45,574 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 49 treesize of output 43 [2022-11-21 16:28:46,193 INFO L350 Elim1Store]: Elim1 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 5 [2022-11-21 16:28:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:46,668 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:28:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:46,841 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 32 [2022-11-21 16:28:46,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:28:46,920 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 19 [2022-11-21 16:28:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:28:46,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:49,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331835754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:49,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:28:49,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 45 [2022-11-21 16:28:49,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303086946] [2022-11-21 16:28:49,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:28:49,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:28:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:28:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3820, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:28:49,560 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 46 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 38 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:28:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:53,771 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2022-11-21 16:28:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:28:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 38 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 65 [2022-11-21 16:28:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:53,773 INFO L225 Difference]: With dead ends: 146 [2022-11-21 16:28:53,773 INFO L226 Difference]: Without dead ends: 146 [2022-11-21 16:28:53,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=532, Invalid=5630, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 16:28:53,774 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:53,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 428 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1223 Invalid, 4 Unknown, 0 Unchecked, 2.7s Time] [2022-11-21 16:28:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-21 16:28:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-21 16:28:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 130 states have internal predecessors, (148), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:28:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 165 transitions. [2022-11-21 16:28:53,779 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 165 transitions. Word has length 65 [2022-11-21 16:28:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:53,780 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 165 transitions. [2022-11-21 16:28:53,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 38 states have internal predecessors, (73), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:28:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 165 transitions. [2022-11-21 16:28:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-21 16:28:53,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:53,781 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:53,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:54,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:54,191 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:28:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2084069824, now seen corresponding path program 5 times [2022-11-21 16:28:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:28:54,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748159419] [2022-11-21 16:28:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:28:54,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:28:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:28:54,193 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:28:54,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-21 16:28:54,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-21 16:28:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-21 16:28:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:54,500 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:28:54,510 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:54,760 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1090 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1090) |c_#length|)))) is different from true [2022-11-21 16:28:54,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:54,785 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:54,803 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:54,803 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:54,979 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1091 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1091))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-21 16:28:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:55,014 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:55,031 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:55,031 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:55,217 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1092 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1092) |c_#length|)))) is different from true [2022-11-21 16:28:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:55,240 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:55,263 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:55,264 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:55,472 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1093 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1093) |c_#length|)))) is different from true [2022-11-21 16:28:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:55,500 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:55,514 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:55,514 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:55,719 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1094 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1094) |c_#length|)))) is different from true [2022-11-21 16:28:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:55,748 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:55,763 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:55,763 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:55,974 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1095 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1095))))) is different from true [2022-11-21 16:28:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:28:55,999 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:56,015 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:28:56,015 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:28:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 42 not checked. [2022-11-21 16:28:56,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:58,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:28:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748159419] [2022-11-21 16:28:58,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748159419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [725457794] [2022-11-21 16:28:58,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:28:58,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:28:58,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:28:58,805 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:28:58,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-21 16:28:59,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-21 16:28:59,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-21 16:28:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:59,360 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:28:59,854 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:28:59,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 16:29:00,451 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1146 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1146) |c_#length|)))) is different from true [2022-11-21 16:29:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:00,517 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-21 16:29:00,517 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:29:00,542 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:29:00,542 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:29:00,836 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1148 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1148) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1147 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1147))))) is different from true [2022-11-21 16:29:00,910 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 16:29:00,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 16:29:00,923 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:29:01,045 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1150 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1150))) (exists ((v_ArrVal_1149 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1149) |c_#length|)))) is different from true [2022-11-21 16:29:01,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:01,077 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:29:01,114 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 16:29:01,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 16:29:01,225 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1151 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1151) |c_#length|)))) is different from true [2022-11-21 16:29:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:01,247 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:29:01,261 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:29:01,261 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:29:01,394 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1152 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1152) |c_#length|)))) is different from true [2022-11-21 16:29:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:01,416 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:29:01,436 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:29:01,437 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:29:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 12 proven. 97 refuted. 0 times theorem prover too weak. 20 trivial. 40 not checked. [2022-11-21 16:29:01,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:03,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [725457794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:03,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:29:03,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 41 [2022-11-21 16:29:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340734131] [2022-11-21 16:29:03,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-21 16:29:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:29:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-21 16:29:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=949, Unknown=11, NotChecked=792, Total=1892 [2022-11-21 16:29:03,932 INFO L87 Difference]: Start difference. First operand 146 states and 165 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 9 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-21 16:29:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:08,628 INFO L93 Difference]: Finished difference Result 253 states and 280 transitions. [2022-11-21 16:29:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:29:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 9 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) Word has length 68 [2022-11-21 16:29:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:08,631 INFO L225 Difference]: With dead ends: 253 [2022-11-21 16:29:08,631 INFO L226 Difference]: Without dead ends: 253 [2022-11-21 16:29:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=287, Invalid=2098, Unknown=11, NotChecked=1144, Total=3540 [2022-11-21 16:29:08,632 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 390 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1452 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:08,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 882 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1589 Invalid, 0 Unknown, 1452 Unchecked, 2.9s Time] [2022-11-21 16:29:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-21 16:29:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 152. [2022-11-21 16:29:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 127 states have (on average 1.204724409448819) internal successors, (153), 135 states have internal predecessors, (153), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:29:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2022-11-21 16:29:08,637 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 68 [2022-11-21 16:29:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:08,637 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2022-11-21 16:29:08,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 9 states have call successors, (9), 3 states have call predecessors, (9), 14 states have return successors, (14), 12 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-21 16:29:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2022-11-21 16:29:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 16:29:08,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:08,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:08,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:08,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:29:09,044 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:29:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -773475623, now seen corresponding path program 4 times [2022-11-21 16:29:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:29:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905671841] [2022-11-21 16:29:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:29:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:29:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:29:09,046 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:29:09,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-21 16:29:09,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:29:09,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:29:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:09,481 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:29:09,620 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:29:09,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:29:09,897 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-21 16:29:09,897 INFO L350 Elim1Store]: Elim1 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 39 [2022-11-21 16:29:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:10,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-21 16:29:10,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:29:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:10,945 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 34 [2022-11-21 16:29:11,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:29:11,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:29:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-21 16:29:11,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:12,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:29:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905671841] [2022-11-21 16:29:12,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905671841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191482769] [2022-11-21 16:29:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:29:12,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:29:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:29:12,031 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:29:12,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-21 16:29:12,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:29:12,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:29:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:12,663 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:29:12,725 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:29:12,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:29:12,898 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-21 16:29:12,898 INFO L350 Elim1Store]: Elim1 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 39 [2022-11-21 16:29:12,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:12,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-21 16:29:13,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-21 16:29:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:29:13,410 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 34 [2022-11-21 16:29:13,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:29:13,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 16:29:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-21 16:29:13,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191482769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:13,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:29:13,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-11-21 16:29:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955151819] [2022-11-21 16:29:13,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:13,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:29:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:29:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:29:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:29:13,767 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:29:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:16,501 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2022-11-21 16:29:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:29:16,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 69 [2022-11-21 16:29:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:16,503 INFO L225 Difference]: With dead ends: 166 [2022-11-21 16:29:16,503 INFO L226 Difference]: Without dead ends: 166 [2022-11-21 16:29:16,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:29:16,504 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 90 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:16,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 558 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1071 Invalid, 2 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:29:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-21 16:29:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-21 16:29:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 148 states have internal predecessors, (167), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:29:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2022-11-21 16:29:16,509 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 69 [2022-11-21 16:29:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:16,510 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2022-11-21 16:29:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:29:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2022-11-21 16:29:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-21 16:29:16,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:16,511 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:16,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:16,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:16,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 16:29:16,926 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:29:16,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash -841784109, now seen corresponding path program 4 times [2022-11-21 16:29:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:29:16,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22351402] [2022-11-21 16:29:16,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:29:16,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:29:16,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:29:16,928 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:29:16,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-21 16:29:17,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:29:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:29:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-21 16:29:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-21 16:29:17,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:29:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22351402] [2022-11-21 16:29:17,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22351402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:17,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:29:17,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 16:29:17,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030633484] [2022-11-21 16:29:17,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:29:17,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:29:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:29:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:29:17,867 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:29:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:18,540 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-11-21 16:29:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:29:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 68 [2022-11-21 16:29:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:18,543 INFO L225 Difference]: With dead ends: 160 [2022-11-21 16:29:18,543 INFO L226 Difference]: Without dead ends: 160 [2022-11-21 16:29:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:29:18,543 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:18,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 532 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:29:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-21 16:29:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2022-11-21 16:29:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 128 states have (on average 1.1171875) internal successors, (143), 135 states have internal predecessors, (143), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:29:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2022-11-21 16:29:18,548 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 68 [2022-11-21 16:29:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:18,549 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2022-11-21 16:29:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:29:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2022-11-21 16:29:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-21 16:29:18,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:18,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:18,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:29:18,764 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:29:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1500722173, now seen corresponding path program 3 times [2022-11-21 16:29:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:29:18,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766802866] [2022-11-21 16:29:18,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:29:18,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:29:18,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:29:18,766 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:29:18,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-21 16:29:19,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:29:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:29:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:19,065 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-21 16:29:19,189 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 16:29:19,189 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-21 16:29:19,250 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:29:21,406 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_181| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130|) (bvadd (_ bv4294967292 32) (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_181|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130|))) is different from true [2022-11-21 16:29:23,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-21 16:29:25,706 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_182| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_182|) (_ bv4294967288 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131|))) is different from true [2022-11-21 16:29:27,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-21 16:29:30,047 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_151| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_183| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_183|) (_ bv4294967284 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_151|))))) is different from true [2022-11-21 16:29:32,755 INFO L350 Elim1Store]: Elim1 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 8 [2022-11-21 16:29:32,872 INFO L350 Elim1Store]: Elim1 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 20 [2022-11-21 16:29:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2022-11-21 16:29:33,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:33,554 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 42 [2022-11-21 16:29:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:29:36,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:29:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766802866] [2022-11-21 16:29:36,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766802866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:36,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:29:36,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 38 [2022-11-21 16:29:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614313994] [2022-11-21 16:29:36,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 16:29:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:29:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 16:29:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1151, Unknown=6, NotChecked=210, Total=1482 [2022-11-21 16:29:36,171 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 39 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 8 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:29:40,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:29:52,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:29:54,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:04,558 WARN L233 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 28 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:30:15,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:17,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:20,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:32,694 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:30:50,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:52,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:54,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:56,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:30:58,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:31:02,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:31:06,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:31:08,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:31:12,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:31:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:31:19,893 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-11-21 16:31:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-21 16:31:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 8 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2022-11-21 16:31:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:31:19,896 INFO L225 Difference]: With dead ends: 243 [2022-11-21 16:31:19,896 INFO L226 Difference]: Without dead ends: 243 [2022-11-21 16:31:19,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 82.5s TimeCoverageRelationStatistics Valid=1536, Invalid=8555, Unknown=21, NotChecked=600, Total=10712 [2022-11-21 16:31:19,903 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 541 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 61 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:31:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 635 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1928 Invalid, 11 Unknown, 440 Unchecked, 36.6s Time] [2022-11-21 16:31:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-21 16:31:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 157. [2022-11-21 16:31:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 139 states have internal predecessors, (150), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:31:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2022-11-21 16:31:19,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 70 [2022-11-21 16:31:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:31:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2022-11-21 16:31:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 8 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 16:31:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2022-11-21 16:31:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-21 16:31:19,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:31:19,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:31:19,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-21 16:31:20,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:31:20,124 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-21 16:31:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:31:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash 915006406, now seen corresponding path program 3 times [2022-11-21 16:31:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:31:20,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818295255] [2022-11-21 16:31:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:31:20,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:31:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:31:20,126 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 16:31:20,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-21 16:31:20,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:31:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-21 16:31:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:20,721 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:31:21,008 INFO L321 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2022-11-21 16:31:21,009 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 43 [2022-11-21 16:31:21,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-21 16:31:22,075 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2022-11-21 16:31:22,075 INFO L350 Elim1Store]: Elim1 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 347 treesize of output 322 [2022-11-21 16:31:22,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:31:22,901 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 84 [2022-11-21 16:31:23,848 INFO L321 Elim1Store]: treesize reduction 126, result has 11.3 percent of original size [2022-11-21 16:31:23,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1625 treesize of output 1561 [2022-11-21 16:31:28,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:31:28,516 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 55 [2022-11-21 16:31:34,355 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (exists ((|v_ULTIMATE.start_entry_point_#t~mem42#1.base_86| (_ BitVec 32)) (v_ArrVal_1353 (_ BitVec 1)) (v_ArrVal_1352 (_ BitVec 1)) (v_ArrVal_1351 (_ BitVec 1)) (v_arrayElimCell_285 (_ BitVec 32)) (v_arrayElimCell_286 (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_1353))) (let ((.cse1 (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_86| v_ArrVal_1351))) (let ((.cse2 (store .cse1 v_arrayElimCell_286 v_ArrVal_1352))) (and (= (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_86|) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_arrayElimCell_286)) (= |c_#valid| (store (store (store (store .cse2 v_arrayElimCell_285 (_ bv0 1)) v_arrayElimCell_286 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem42#1.base_86| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select .cse2 v_arrayElimCell_285))))))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-11-21 16:31:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 16:31:34,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:31:50,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:31:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818295255] [2022-11-21 16:31:50,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818295255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:31:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118729636] [2022-11-21 16:31:50,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:31:50,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 16:31:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 16:31:50,154 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 16:31:50,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de36533-848c-4291-a9d7-ca839c547de4/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-21 16:31:50,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:31:50,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:31:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-21 16:31:50,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:31:58,258 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:31:58,268 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:31:59,948 INFO L321 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2022-11-21 16:31:59,948 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 64 [2022-11-21 16:32:08,724 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:32:16,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 86 [2022-11-21 16:32:16,429 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 42 [2022-11-21 16:32:19,244 INFO L321 Elim1Store]: treesize reduction 70, result has 6.7 percent of original size [2022-11-21 16:32:19,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 171 treesize of output 158 [2022-11-21 16:32:36,666 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 67 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:33:10,845 WARN L233 SmtUtils]: Spent 22.43s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:33:36,062 WARN L233 SmtUtils]: Spent 22.43s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)