./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8 --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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- 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-2329fc7 [2022-12-13 16:07:47,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:07:47,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:07:47,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:07:47,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:07:47,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:07:47,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:07:47,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:07:47,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:07:47,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:07:47,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:07:47,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:07:47,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:07:47,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:07:47,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:07:47,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:07:47,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:07:47,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:07:47,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:07:47,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:07:47,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:07:47,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:07:47,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:07:47,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:07:47,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:07:47,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:07:47,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:07:47,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:07:47,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:07:47,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:07:47,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:07:47,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:07:47,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:07:47,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:07:47,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:07:47,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:07:47,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:07:47,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:07:47,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:07:47,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:07:47,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:07:47,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:07:47,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:07:47,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:07:47,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:07:47,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:07:47,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:07:47,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:07:47,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:07:47,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:07:47,717 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:07:47,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:07:47,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:07:47,718 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:07:47,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:07:47,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:07:47,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:07:47,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:07:47,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:07:47,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:07:47,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:07:47,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:07:47,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:07:47,721 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:07:47,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:07:47,721 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:07:47,721 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2022-12-13 16:07:47,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:07:47,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:07:47,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:07:47,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:07:47,918 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:07:47,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-12-13 16:07:50,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:07:50,726 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:07:50,727 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-12-13 16:07:50,737 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/data/a26d78e2c/a53a21e4c6b942818bf2e1244c85c55c/FLAGdc1d8fccb [2022-12-13 16:07:50,749 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/data/a26d78e2c/a53a21e4c6b942818bf2e1244c85c55c [2022-12-13 16:07:50,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:07:50,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:07:50,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:07:50,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:07:50,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:07:50,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:07:50" (1/1) ... [2022-12-13 16:07:50,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65629807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:50, skipping insertion in model container [2022-12-13 16:07:50,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:07:50" (1/1) ... [2022-12-13 16:07:50,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:07:50,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:07:51,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:07:51,041 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:07:51,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:07:51,098 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:07:51,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51 WrapperNode [2022-12-13 16:07:51,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:07:51,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:07:51,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:07:51,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:07:51,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,131 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2022-12-13 16:07:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:07:51,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:07:51,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:07:51,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:07:51,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:07:51,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:07:51,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:07:51,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:07:51,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (1/1) ... [2022-12-13 16:07:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:07:51,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:51,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:07:51,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 16:07:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 16:07:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:07:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:07:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:07:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:07:51,320 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:07:51,322 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:07:51,531 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:07:51,538 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:07:51,538 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:07:51,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:07:51 BoogieIcfgContainer [2022-12-13 16:07:51,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:07:51,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:07:51,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:07:51,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:07:51,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:07:50" (1/3) ... [2022-12-13 16:07:51,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356fd60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:07:51, skipping insertion in model container [2022-12-13 16:07:51,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:51" (2/3) ... [2022-12-13 16:07:51,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356fd60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:07:51, skipping insertion in model container [2022-12-13 16:07:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:07:51" (3/3) ... [2022-12-13 16:07:51,548 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2022-12-13 16:07:51,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:07:51,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-13 16:07:51,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:07:51,611 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=PETRI_NET, 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;@6640d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:07:51,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 16:07:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 16:07:51,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:51,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:07:51,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 28819106, now seen corresponding path program 1 times [2022-12-13 16:07:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312707673] [2022-12-13 16:07:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312707673] [2022-12-13 16:07:51,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312707673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:51,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:51,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:07:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035996016] [2022-12-13 16:07:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:07:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:07:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:07:51,778 INFO L87 Difference]: Start difference. First operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:51,793 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-12-13 16:07:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:07:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-13 16:07:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:51,804 INFO L225 Difference]: With dead ends: 64 [2022-12-13 16:07:51,804 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 16:07:51,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:07:51,808 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:51,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 16:07:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-13 16:07:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.880952380952381) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-12-13 16:07:51,836 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 5 [2022-12-13 16:07:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:51,836 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-12-13 16:07:51,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-12-13 16:07:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 16:07:51,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:51,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:07:51,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1806851052, now seen corresponding path program 1 times [2022-12-13 16:07:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674621592] [2022-12-13 16:07:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:51,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674621592] [2022-12-13 16:07:51,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674621592] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:51,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:51,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:07:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375815957] [2022-12-13 16:07:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:07:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:07:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:51,889 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:51,903 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2022-12-13 16:07:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:07:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 16:07:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:51,904 INFO L225 Difference]: With dead ends: 63 [2022-12-13 16:07:51,904 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 16:07:51,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:51,905 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:51,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 16:07:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-13 16:07:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-12-13 16:07:51,910 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 7 [2022-12-13 16:07:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:51,910 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-12-13 16:07:51,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-12-13 16:07:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 16:07:51,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:51,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:07:51,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1806910634, now seen corresponding path program 1 times [2022-12-13 16:07:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482234813] [2022-12-13 16:07:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482234813] [2022-12-13 16:07:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482234813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:51,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:51,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:07:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403296656] [2022-12-13 16:07:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:07:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:07:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:51,957 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:51,985 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-12-13 16:07:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:07:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 16:07:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:51,986 INFO L225 Difference]: With dead ends: 111 [2022-12-13 16:07:51,986 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 16:07:51,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:51,987 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:51,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 16:07:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2022-12-13 16:07:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 92 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2022-12-13 16:07:51,994 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 7 [2022-12-13 16:07:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:51,994 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2022-12-13 16:07:51,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2022-12-13 16:07:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:07:51,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:51,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:07:51,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2022-12-13 16:07:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:51,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385968768] [2022-12-13 16:07:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385968768] [2022-12-13 16:07:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385968768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:07:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055515899] [2022-12-13 16:07:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:07:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:07:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:07:52,071 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,117 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-12-13 16:07:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:07:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 16:07:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,118 INFO L225 Difference]: With dead ends: 101 [2022-12-13 16:07:52,119 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 16:07:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:07:52,120 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 211 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 [2022-12-13 16:07:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 211 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 16:07:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-12-13 16:07:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2022-12-13 16:07:52,128 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 8 [2022-12-13 16:07:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,128 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2022-12-13 16:07:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2022-12-13 16:07:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:07:52,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:07:52,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 179653412, now seen corresponding path program 1 times [2022-12-13 16:07:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982186455] [2022-12-13 16:07:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982186455] [2022-12-13 16:07:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982186455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:07:52,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25556815] [2022-12-13 16:07:52,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:07:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:07:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,168 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,221 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2022-12-13 16:07:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:07:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 16:07:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,223 INFO L225 Difference]: With dead ends: 177 [2022-12-13 16:07:52,223 INFO L226 Difference]: Without dead ends: 174 [2022-12-13 16:07:52,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,224 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-13 16:07:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2022-12-13 16:07:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.849624060150376) internal successors, (246), 152 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 246 transitions. [2022-12-13 16:07:52,236 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 246 transitions. Word has length 8 [2022-12-13 16:07:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,236 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 246 transitions. [2022-12-13 16:07:52,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 246 transitions. [2022-12-13 16:07:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:07:52,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:07:52,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2022-12-13 16:07:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314329481] [2022-12-13 16:07:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314329481] [2022-12-13 16:07:52,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314329481] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:07:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266173662] [2022-12-13 16:07:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:07:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:07:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,297 INFO L87 Difference]: Start difference. First operand 153 states and 246 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,347 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2022-12-13 16:07:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:07:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 16:07:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,348 INFO L225 Difference]: With dead ends: 231 [2022-12-13 16:07:52,348 INFO L226 Difference]: Without dead ends: 231 [2022-12-13 16:07:52,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,349 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 69 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-13 16:07:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2022-12-13 16:07:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 190 states have (on average 1.7894736842105263) internal successors, (340), 207 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 340 transitions. [2022-12-13 16:07:52,362 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 340 transitions. Word has length 8 [2022-12-13 16:07:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,362 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 340 transitions. [2022-12-13 16:07:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 340 transitions. [2022-12-13 16:07:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:07:52,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:07:52,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2022-12-13 16:07:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433628644] [2022-12-13 16:07:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433628644] [2022-12-13 16:07:52,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433628644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:07:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421612378] [2022-12-13 16:07:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:07:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:07:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,435 INFO L87 Difference]: Start difference. First operand 208 states and 340 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,476 INFO L93 Difference]: Finished difference Result 226 states and 346 transitions. [2022-12-13 16:07:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:07:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 16:07:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,477 INFO L225 Difference]: With dead ends: 226 [2022-12-13 16:07:52,478 INFO L226 Difference]: Without dead ends: 226 [2022-12-13 16:07:52,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:07:52,479 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-13 16:07:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2022-12-13 16:07:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.7473684210526317) internal successors, (332), 205 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 332 transitions. [2022-12-13 16:07:52,487 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 332 transitions. Word has length 8 [2022-12-13 16:07:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,488 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 332 transitions. [2022-12-13 16:07:52,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 332 transitions. [2022-12-13 16:07:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 16:07:52,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:07:52,489 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2022-12-13 16:07:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612115366] [2022-12-13 16:07:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612115366] [2022-12-13 16:07:52,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612115366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:07:52,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300169994] [2022-12-13 16:07:52,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:07:52,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:07:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:07:52,531 INFO L87 Difference]: Start difference. First operand 206 states and 332 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,558 INFO L93 Difference]: Finished difference Result 265 states and 366 transitions. [2022-12-13 16:07:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:07:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 16:07:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,559 INFO L225 Difference]: With dead ends: 265 [2022-12-13 16:07:52,559 INFO L226 Difference]: Without dead ends: 265 [2022-12-13 16:07:52,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:07:52,560 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-12-13 16:07:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2022-12-13 16:07:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.6821192052980132) internal successors, (254), 162 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 254 transitions. [2022-12-13 16:07:52,568 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 254 transitions. Word has length 9 [2022-12-13 16:07:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,568 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 254 transitions. [2022-12-13 16:07:52,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,569 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 254 transitions. [2022-12-13 16:07:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 16:07:52,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:07:52,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash 845049582, now seen corresponding path program 1 times [2022-12-13 16:07:52,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758712718] [2022-12-13 16:07:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758712718] [2022-12-13 16:07:52,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758712718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:07:52,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:07:52,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:07:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575200063] [2022-12-13 16:07:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:07:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:07:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:07:52,606 INFO L87 Difference]: Start difference. First operand 163 states and 254 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,633 INFO L93 Difference]: Finished difference Result 362 states and 528 transitions. [2022-12-13 16:07:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:07:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 16:07:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,635 INFO L225 Difference]: With dead ends: 362 [2022-12-13 16:07:52,635 INFO L226 Difference]: Without dead ends: 362 [2022-12-13 16:07:52,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:07:52,636 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 107 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 232 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-12-13 16:07:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 234. [2022-12-13 16:07:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.6036036036036037) internal successors, (356), 233 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 356 transitions. [2022-12-13 16:07:52,645 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 356 transitions. Word has length 10 [2022-12-13 16:07:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,645 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 356 transitions. [2022-12-13 16:07:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 356 transitions. [2022-12-13 16:07:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 16:07:52,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:07:52,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 22246394, now seen corresponding path program 1 times [2022-12-13 16:07:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:52,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521929544] [2022-12-13 16:07:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521929544] [2022-12-13 16:07:52,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521929544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:52,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980393349] [2022-12-13 16:07:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:52,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:52,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:52,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:07:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:07:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:52,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980393349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:52,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:52,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-12-13 16:07:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9787534] [2022-12-13 16:07:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:07:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:07:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:07:52,840 INFO L87 Difference]: Start difference. First operand 234 states and 356 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:52,894 INFO L93 Difference]: Finished difference Result 238 states and 346 transitions. [2022-12-13 16:07:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:07:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 16:07:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:52,895 INFO L225 Difference]: With dead ends: 238 [2022-12-13 16:07:52,895 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 16:07:52,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:07:52,896 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 139 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:52,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 338 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 16:07:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-12-13 16:07:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 229 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 344 transitions. [2022-12-13 16:07:52,903 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 344 transitions. Word has length 16 [2022-12-13 16:07:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:52,903 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 344 transitions. [2022-12-13 16:07:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 344 transitions. [2022-12-13 16:07:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 16:07:52,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:52,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:52,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:07:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:07:53,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 617603772, now seen corresponding path program 1 times [2022-12-13 16:07:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117402759] [2022-12-13 16:07:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117402759] [2022-12-13 16:07:53,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117402759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228264213] [2022-12-13 16:07:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:53,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:53,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:53,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:07:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:07:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:53,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:53,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228264213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:53,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:53,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-13 16:07:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143585168] [2022-12-13 16:07:53,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:53,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:07:53,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:53,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:07:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:07:53,352 INFO L87 Difference]: Start difference. First operand 230 states and 344 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:53,407 INFO L93 Difference]: Finished difference Result 525 states and 738 transitions. [2022-12-13 16:07:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:07:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 16:07:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:53,409 INFO L225 Difference]: With dead ends: 525 [2022-12-13 16:07:53,409 INFO L226 Difference]: Without dead ends: 525 [2022-12-13 16:07:53,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:07:53,409 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 207 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:53,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 528 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-13 16:07:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-12-13 16:07:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.5305466237942122) internal successors, (476), 322 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 476 transitions. [2022-12-13 16:07:53,415 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 476 transitions. Word has length 16 [2022-12-13 16:07:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:53,415 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 476 transitions. [2022-12-13 16:07:53,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 476 transitions. [2022-12-13 16:07:53,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 16:07:53,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:53,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:53,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:07:53,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 16:07:53,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1134377974, now seen corresponding path program 2 times [2022-12-13 16:07:53,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:53,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219291330] [2022-12-13 16:07:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:53,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 16:07:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:53,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219291330] [2022-12-13 16:07:53,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219291330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:53,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407499433] [2022-12-13 16:07:53,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:07:53,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:53,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:53,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:07:53,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:07:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:07:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:07:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:53,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:53,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407499433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:53,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:53,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-12-13 16:07:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546796347] [2022-12-13 16:07:53,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:07:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:07:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:07:53,822 INFO L87 Difference]: Start difference. First operand 323 states and 476 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:53,908 INFO L93 Difference]: Finished difference Result 525 states and 726 transitions. [2022-12-13 16:07:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:07:53,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 16:07:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:53,909 INFO L225 Difference]: With dead ends: 525 [2022-12-13 16:07:53,909 INFO L226 Difference]: Without dead ends: 525 [2022-12-13 16:07:53,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:07:53,910 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 390 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:53,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 420 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-13 16:07:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-12-13 16:07:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.4919614147909968) internal successors, (464), 322 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 464 transitions. [2022-12-13 16:07:53,916 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 464 transitions. Word has length 22 [2022-12-13 16:07:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:53,916 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 464 transitions. [2022-12-13 16:07:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 464 transitions. [2022-12-13 16:07:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 16:07:53,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:53,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:53,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:07:54,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:07:54,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:54,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1692627395, now seen corresponding path program 1 times [2022-12-13 16:07:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925578220] [2022-12-13 16:07:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:54,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925578220] [2022-12-13 16:07:54,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925578220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:54,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990678255] [2022-12-13 16:07:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:54,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:54,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:54,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:54,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:07:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:07:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990678255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:54,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:54,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-13 16:07:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250289076] [2022-12-13 16:07:54,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:54,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:07:54,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:07:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:07:54,301 INFO L87 Difference]: Start difference. First operand 323 states and 464 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:54,358 INFO L93 Difference]: Finished difference Result 936 states and 1334 transitions. [2022-12-13 16:07:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:07:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 16:07:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:54,363 INFO L225 Difference]: With dead ends: 936 [2022-12-13 16:07:54,363 INFO L226 Difference]: Without dead ends: 936 [2022-12-13 16:07:54,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:07:54,364 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:54,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 167 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-12-13 16:07:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 811. [2022-12-13 16:07:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 799 states have (on average 1.4793491864831039) internal successors, (1182), 810 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1182 transitions. [2022-12-13 16:07:54,377 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1182 transitions. Word has length 24 [2022-12-13 16:07:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:54,377 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1182 transitions. [2022-12-13 16:07:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1182 transitions. [2022-12-13 16:07:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 16:07:54,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:54,378 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:54,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:07:54,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:54,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -6965384, now seen corresponding path program 1 times [2022-12-13 16:07:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:54,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083592688] [2022-12-13 16:07:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083592688] [2022-12-13 16:07:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083592688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937001207] [2022-12-13 16:07:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:54,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:54,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:07:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:07:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937001207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:54,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:54,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 16:07:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532359712] [2022-12-13 16:07:54,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:54,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:07:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:07:54,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:07:54,870 INFO L87 Difference]: Start difference. First operand 811 states and 1182 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:54,978 INFO L93 Difference]: Finished difference Result 2807 states and 3858 transitions. [2022-12-13 16:07:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:07:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 16:07:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:54,984 INFO L225 Difference]: With dead ends: 2807 [2022-12-13 16:07:54,984 INFO L226 Difference]: Without dead ends: 2807 [2022-12-13 16:07:54,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:07:54,984 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 557 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:54,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 583 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:07:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-12-13 16:07:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 1879. [2022-12-13 16:07:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1867 states have (on average 1.432244242099625) internal successors, (2674), 1878 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2674 transitions. [2022-12-13 16:07:55,014 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2674 transitions. Word has length 27 [2022-12-13 16:07:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2674 transitions. [2022-12-13 16:07:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2674 transitions. [2022-12-13 16:07:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 16:07:55,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:55,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:55,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:07:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:07:55,217 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash 554127938, now seen corresponding path program 1 times [2022-12-13 16:07:55,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43236993] [2022-12-13 16:07:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:55,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:07:55,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43236993] [2022-12-13 16:07:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43236993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971843123] [2022-12-13 16:07:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:55,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:55,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:07:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:55,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:07:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:07:55,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:07:55,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971843123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:55,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:55,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 16:07:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734470488] [2022-12-13 16:07:55,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:55,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:07:55,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:07:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:07:55,544 INFO L87 Difference]: Start difference. First operand 1879 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:55,597 INFO L93 Difference]: Finished difference Result 1558 states and 2125 transitions. [2022-12-13 16:07:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:07:55,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 16:07:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:55,600 INFO L225 Difference]: With dead ends: 1558 [2022-12-13 16:07:55,600 INFO L226 Difference]: Without dead ends: 1558 [2022-12-13 16:07:55,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:07:55,601 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 376 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:55,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 520 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-12-13 16:07:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 885. [2022-12-13 16:07:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 884 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1226 transitions. [2022-12-13 16:07:55,615 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1226 transitions. Word has length 27 [2022-12-13 16:07:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:55,615 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1226 transitions. [2022-12-13 16:07:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1226 transitions. [2022-12-13 16:07:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:07:55,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:55,616 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:55,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:07:55,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:07:55,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2001409998, now seen corresponding path program 1 times [2022-12-13 16:07:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:55,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755403732] [2022-12-13 16:07:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 16:07:55,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:55,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755403732] [2022-12-13 16:07:55,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755403732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:55,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159732702] [2022-12-13 16:07:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:55,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:55,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:07:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 16:07:56,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:56,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:07:56,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159732702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:56,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:56,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2022-12-13 16:07:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388537305] [2022-12-13 16:07:56,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:07:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:07:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:07:56,163 INFO L87 Difference]: Start difference. First operand 885 states and 1226 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:56,419 INFO L93 Difference]: Finished difference Result 2448 states and 3223 transitions. [2022-12-13 16:07:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:07:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 16:07:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:56,424 INFO L225 Difference]: With dead ends: 2448 [2022-12-13 16:07:56,424 INFO L226 Difference]: Without dead ends: 2448 [2022-12-13 16:07:56,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:07:56,424 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1395 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:56,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 811 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:07:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-12-13 16:07:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 984. [2022-12-13 16:07:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 972 states have (on average 1.4207818930041152) internal successors, (1381), 983 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1381 transitions. [2022-12-13 16:07:56,442 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1381 transitions. Word has length 51 [2022-12-13 16:07:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:56,442 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1381 transitions. [2022-12-13 16:07:56,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1381 transitions. [2022-12-13 16:07:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 16:07:56,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:56,443 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:56,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:07:56,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:07:56,644 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1426339750, now seen corresponding path program 1 times [2022-12-13 16:07:56,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:56,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861365293] [2022-12-13 16:07:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 16:07:56,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:56,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861365293] [2022-12-13 16:07:56,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861365293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:56,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108908804] [2022-12-13 16:07:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:56,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:56,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:56,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:07:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:07:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:07:56,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:07:56,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108908804] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:56,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:07:56,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2022-12-13 16:07:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567053725] [2022-12-13 16:07:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:07:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:07:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:07:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:07:56,896 INFO L87 Difference]: Start difference. First operand 984 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:56,976 INFO L93 Difference]: Finished difference Result 2310 states and 3137 transitions. [2022-12-13 16:07:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:07:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 16:07:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:56,980 INFO L225 Difference]: With dead ends: 2310 [2022-12-13 16:07:56,980 INFO L226 Difference]: Without dead ends: 2310 [2022-12-13 16:07:56,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:07:56,981 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 267 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 388 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:07:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-12-13 16:07:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1632. [2022-12-13 16:07:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1620 states have (on average 1.3962962962962964) internal successors, (2262), 1631 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2262 transitions. [2022-12-13 16:07:57,002 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2262 transitions. Word has length 59 [2022-12-13 16:07:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:57,002 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2262 transitions. [2022-12-13 16:07:57,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2262 transitions. [2022-12-13 16:07:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 16:07:57,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:57,003 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:57,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:07:57,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:07:57,204 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash -443713253, now seen corresponding path program 1 times [2022-12-13 16:07:57,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:57,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968919893] [2022-12-13 16:07:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:57,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 16:07:57,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968919893] [2022-12-13 16:07:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968919893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:57,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452854433] [2022-12-13 16:07:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:57,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:57,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:57,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:57,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:07:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:07:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 16:07:57,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 16:07:57,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452854433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:57,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:57,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-12-13 16:07:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052469397] [2022-12-13 16:07:57,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:07:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:07:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:07:57,438 INFO L87 Difference]: Start difference. First operand 1632 states and 2262 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:58,281 INFO L93 Difference]: Finished difference Result 9168 states and 12495 transitions. [2022-12-13 16:07:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 16:07:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 16:07:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:58,304 INFO L225 Difference]: With dead ends: 9168 [2022-12-13 16:07:58,304 INFO L226 Difference]: Without dead ends: 9168 [2022-12-13 16:07:58,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=631, Invalid=2021, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 16:07:58,305 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1527 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:58,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 717 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:07:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2022-12-13 16:07:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 4625. [2022-12-13 16:07:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4614 states have (on average 1.4195925444299957) internal successors, (6550), 4624 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 6550 transitions. [2022-12-13 16:07:58,371 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 6550 transitions. Word has length 59 [2022-12-13 16:07:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:58,371 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 6550 transitions. [2022-12-13 16:07:58,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 6550 transitions. [2022-12-13 16:07:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 16:07:58,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:58,372 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:07:58,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:07:58,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:07:58,573 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash -791217300, now seen corresponding path program 1 times [2022-12-13 16:07:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:58,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78954472] [2022-12-13 16:07:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 16:07:58,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78954472] [2022-12-13 16:07:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78954472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376454677] [2022-12-13 16:07:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:58,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:58,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:07:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:07:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:07:58,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:07:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:07:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376454677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:07:58,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:07:58,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-12-13 16:07:58,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79715456] [2022-12-13 16:07:58,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:07:58,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:07:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:07:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:07:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:07:58,870 INFO L87 Difference]: Start difference. First operand 4625 states and 6550 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:07:59,323 INFO L93 Difference]: Finished difference Result 10247 states and 14121 transitions. [2022-12-13 16:07:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 16:07:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 16:07:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:07:59,342 INFO L225 Difference]: With dead ends: 10247 [2022-12-13 16:07:59,342 INFO L226 Difference]: Without dead ends: 10247 [2022-12-13 16:07:59,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 16:07:59,343 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1095 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:07:59,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 1379 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:07:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2022-12-13 16:07:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 4425. [2022-12-13 16:07:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4414 states have (on average 1.3948799275033983) internal successors, (6157), 4424 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6157 transitions. [2022-12-13 16:07:59,419 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6157 transitions. Word has length 63 [2022-12-13 16:07:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:07:59,419 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 6157 transitions. [2022-12-13 16:07:59,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:07:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6157 transitions. [2022-12-13 16:07:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 16:07:59,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:07:59,421 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 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] [2022-12-13 16:07:59,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:07:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:59,623 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:07:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:07:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash 767429099, now seen corresponding path program 1 times [2022-12-13 16:07:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:07:59,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743092941] [2022-12-13 16:07:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:59,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:07:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 16:07:59,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:07:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743092941] [2022-12-13 16:07:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743092941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:07:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826878646] [2022-12-13 16:07:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:07:59,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:07:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:59,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:07:59,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:07:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:07:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:07:59,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:07:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:07:59,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 16:08:00,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826878646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:00,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:00,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-12-13 16:08:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147681955] [2022-12-13 16:08:00,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:00,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:08:00,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:08:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:08:00,017 INFO L87 Difference]: Start difference. First operand 4425 states and 6157 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:00,217 INFO L93 Difference]: Finished difference Result 3827 states and 5012 transitions. [2022-12-13 16:08:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:08:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 16:08:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:00,222 INFO L225 Difference]: With dead ends: 3827 [2022-12-13 16:08:00,222 INFO L226 Difference]: Without dead ends: 3827 [2022-12-13 16:08:00,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:08:00,223 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 603 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:00,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 2060 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-12-13 16:08:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2865. [2022-12-13 16:08:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.3135949544498948) internal successors, (3749), 2864 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3749 transitions. [2022-12-13 16:08:00,253 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3749 transitions. Word has length 63 [2022-12-13 16:08:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:00,254 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3749 transitions. [2022-12-13 16:08:00,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3749 transitions. [2022-12-13 16:08:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 16:08:00,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:00,254 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:00,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:08:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:00,456 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 965172541, now seen corresponding path program 1 times [2022-12-13 16:08:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:00,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346734329] [2022-12-13 16:08:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 16:08:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346734329] [2022-12-13 16:08:00,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346734329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164904808] [2022-12-13 16:08:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:00,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:00,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:08:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:08:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 16:08:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 16:08:00,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164904808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:00,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:00,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 16:08:00,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621000344] [2022-12-13 16:08:00,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:00,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:00,799 INFO L87 Difference]: Start difference. First operand 2865 states and 3749 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:00,856 INFO L93 Difference]: Finished difference Result 2863 states and 3720 transitions. [2022-12-13 16:08:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:08:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-13 16:08:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:00,861 INFO L225 Difference]: With dead ends: 2863 [2022-12-13 16:08:00,861 INFO L226 Difference]: Without dead ends: 2863 [2022-12-13 16:08:00,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:08:00,862 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 110 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:00,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 256 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:08:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-12-13 16:08:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2854. [2022-12-13 16:08:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2843 states have (on average 1.307069996482589) internal successors, (3716), 2853 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3716 transitions. [2022-12-13 16:08:00,889 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3716 transitions. Word has length 64 [2022-12-13 16:08:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:00,889 INFO L495 AbstractCegarLoop]: Abstraction has 2854 states and 3716 transitions. [2022-12-13 16:08:00,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3716 transitions. [2022-12-13 16:08:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 16:08:00,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:00,890 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:00,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:08:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:01,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1737502264, now seen corresponding path program 1 times [2022-12-13 16:08:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:01,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639913819] [2022-12-13 16:08:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:08:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639913819] [2022-12-13 16:08:01,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639913819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732036273] [2022-12-13 16:08:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:01,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:01,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:01,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:08:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:01,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 16:08:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 16:08:01,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 16:08:01,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732036273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:01,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:01,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-12-13 16:08:01,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374378427] [2022-12-13 16:08:01,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:01,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:08:01,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:08:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:08:01,474 INFO L87 Difference]: Start difference. First operand 2854 states and 3716 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:01,707 INFO L93 Difference]: Finished difference Result 3939 states and 5165 transitions. [2022-12-13 16:08:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:08:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-13 16:08:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:01,712 INFO L225 Difference]: With dead ends: 3939 [2022-12-13 16:08:01,712 INFO L226 Difference]: Without dead ends: 3939 [2022-12-13 16:08:01,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:08:01,712 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 356 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:01,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 778 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2022-12-13 16:08:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2136. [2022-12-13 16:08:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2125 states have (on average 1.3035294117647058) internal successors, (2770), 2135 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2770 transitions. [2022-12-13 16:08:01,742 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2770 transitions. Word has length 65 [2022-12-13 16:08:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:01,742 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 2770 transitions. [2022-12-13 16:08:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2770 transitions. [2022-12-13 16:08:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 16:08:01,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:01,743 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:01,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:08:01,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 16:08:01,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1937207539, now seen corresponding path program 1 times [2022-12-13 16:08:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:01,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437053858] [2022-12-13 16:08:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:01,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 16:08:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437053858] [2022-12-13 16:08:02,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437053858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945480962] [2022-12-13 16:08:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:02,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:02,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:02,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:02,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:08:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 16:08:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:02,214 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 [2022-12-13 16:08:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 16:08:02,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 16:08:02,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945480962] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:02,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:02,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 16:08:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796139210] [2022-12-13 16:08:02,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:02,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:08:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:08:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:08:02,492 INFO L87 Difference]: Start difference. First operand 2136 states and 2770 transitions. Second operand has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:02,716 INFO L93 Difference]: Finished difference Result 4146 states and 5271 transitions. [2022-12-13 16:08:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:08:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-13 16:08:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:02,721 INFO L225 Difference]: With dead ends: 4146 [2022-12-13 16:08:02,721 INFO L226 Difference]: Without dead ends: 4146 [2022-12-13 16:08:02,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:08:02,722 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 523 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:02,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 624 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:08:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-12-13 16:08:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3102. [2022-12-13 16:08:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3091 states have (on average 1.3154318990617924) internal successors, (4066), 3101 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4066 transitions. [2022-12-13 16:08:02,751 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4066 transitions. Word has length 69 [2022-12-13 16:08:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:02,752 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4066 transitions. [2022-12-13 16:08:02,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4066 transitions. [2022-12-13 16:08:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 16:08:02,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:02,753 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 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, 1] [2022-12-13 16:08:02,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 16:08:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 16:08:02,954 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1779624174, now seen corresponding path program 1 times [2022-12-13 16:08:02,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31278164] [2022-12-13 16:08:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:02,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 16:08:03,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31278164] [2022-12-13 16:08:03,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31278164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:03,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:03,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:08:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060761504] [2022-12-13 16:08:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:08:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:08:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:08:03,071 INFO L87 Difference]: Start difference. First operand 3102 states and 4066 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:03,147 INFO L93 Difference]: Finished difference Result 6805 states and 8699 transitions. [2022-12-13 16:08:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:08:03,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-12-13 16:08:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:03,153 INFO L225 Difference]: With dead ends: 6805 [2022-12-13 16:08:03,153 INFO L226 Difference]: Without dead ends: 6805 [2022-12-13 16:08:03,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:08:03,154 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 194 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:03,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 406 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:08:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6805 states. [2022-12-13 16:08:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6805 to 3244. [2022-12-13 16:08:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3233 states have (on average 1.3201360965047944) internal successors, (4268), 3243 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4268 transitions. [2022-12-13 16:08:03,200 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4268 transitions. Word has length 88 [2022-12-13 16:08:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:03,200 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4268 transitions. [2022-12-13 16:08:03,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4268 transitions. [2022-12-13 16:08:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-13 16:08:03,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:03,202 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 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, 1] [2022-12-13 16:08:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 16:08:03,203 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash -93068261, now seen corresponding path program 1 times [2022-12-13 16:08:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:03,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113986625] [2022-12-13 16:08:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 61 proven. 147 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 16:08:03,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113986625] [2022-12-13 16:08:03,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113986625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679032760] [2022-12-13 16:08:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:03,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:03,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:03,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:08:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:08:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-12-13 16:08:03,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:08:03,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679032760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:03,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:08:03,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-12-13 16:08:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638586806] [2022-12-13 16:08:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:03,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:08:03,476 INFO L87 Difference]: Start difference. First operand 3244 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:03,496 INFO L93 Difference]: Finished difference Result 3609 states and 4617 transitions. [2022-12-13 16:08:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-12-13 16:08:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:03,498 INFO L225 Difference]: With dead ends: 3609 [2022-12-13 16:08:03,498 INFO L226 Difference]: Without dead ends: 3609 [2022-12-13 16:08:03,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:08:03,499 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:03,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:08:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2022-12-13 16:08:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3280. [2022-12-13 16:08:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3269 states have (on average 1.2970327317222392) internal successors, (4240), 3279 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4240 transitions. [2022-12-13 16:08:03,525 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4240 transitions. Word has length 96 [2022-12-13 16:08:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:03,525 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 4240 transitions. [2022-12-13 16:08:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4240 transitions. [2022-12-13 16:08:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 16:08:03,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:03,527 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 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] [2022-12-13 16:08:03,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:03,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:08:03,728 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1826247984, now seen corresponding path program 1 times [2022-12-13 16:08:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969118711] [2022-12-13 16:08:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:03,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 16:08:03,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969118711] [2022-12-13 16:08:03,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969118711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501261144] [2022-12-13 16:08:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:03,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:03,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:03,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:08:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 16:08:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-13 16:08:04,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-13 16:08:04,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501261144] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:04,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-12-13 16:08:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475740999] [2022-12-13 16:08:04,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:08:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:08:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:08:04,068 INFO L87 Difference]: Start difference. First operand 3280 states and 4240 transitions. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:04,222 INFO L93 Difference]: Finished difference Result 3904 states and 4668 transitions. [2022-12-13 16:08:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 16:08:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-13 16:08:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:04,225 INFO L225 Difference]: With dead ends: 3904 [2022-12-13 16:08:04,225 INFO L226 Difference]: Without dead ends: 3904 [2022-12-13 16:08:04,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:08:04,225 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 727 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:04,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 2344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-12-13 16:08:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2228. [2022-12-13 16:08:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2218 states have (on average 1.21190261496844) internal successors, (2688), 2227 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2688 transitions. [2022-12-13 16:08:04,251 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2688 transitions. Word has length 98 [2022-12-13 16:08:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:04,251 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 2688 transitions. [2022-12-13 16:08:04,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2688 transitions. [2022-12-13 16:08:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 16:08:04,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:04,252 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:04,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:08:04,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:04,453 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash -932844676, now seen corresponding path program 1 times [2022-12-13 16:08:04,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:04,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21914074] [2022-12-13 16:08:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:04,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:04,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21914074] [2022-12-13 16:08:04,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21914074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028846091] [2022-12-13 16:08:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:04,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:04,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:04,581 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:04,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:08:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:08:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:04,674 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 [2022-12-13 16:08:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:04,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028846091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:04,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:04,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 16:08:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671690156] [2022-12-13 16:08:04,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:08:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:08:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:08:04,848 INFO L87 Difference]: Start difference. First operand 2228 states and 2688 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:05,024 INFO L93 Difference]: Finished difference Result 3146 states and 3743 transitions. [2022-12-13 16:08:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:08:05,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-12-13 16:08:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:05,026 INFO L225 Difference]: With dead ends: 3146 [2022-12-13 16:08:05,026 INFO L226 Difference]: Without dead ends: 3146 [2022-12-13 16:08:05,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:08:05,027 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 327 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:05,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 409 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-12-13 16:08:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2229. [2022-12-13 16:08:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2220 states have (on average 1.212162162162162) internal successors, (2691), 2228 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2691 transitions. [2022-12-13 16:08:05,045 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2691 transitions. Word has length 111 [2022-12-13 16:08:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:05,045 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 2691 transitions. [2022-12-13 16:08:05,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2691 transitions. [2022-12-13 16:08:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 16:08:05,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:05,046 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:05,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 16:08:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:08:05,248 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -932844675, now seen corresponding path program 1 times [2022-12-13 16:08:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377553324] [2022-12-13 16:08:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377553324] [2022-12-13 16:08:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377553324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770625901] [2022-12-13 16:08:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:05,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:05,444 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:05,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 16:08:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:08:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:05,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:06,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770625901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:06,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:06,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2022-12-13 16:08:06,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841550887] [2022-12-13 16:08:06,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:06,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 16:08:06,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:06,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 16:08:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:08:06,066 INFO L87 Difference]: Start difference. First operand 2229 states and 2691 transitions. Second operand has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:06,588 INFO L93 Difference]: Finished difference Result 6465 states and 7732 transitions. [2022-12-13 16:08:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:08:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-12-13 16:08:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:06,592 INFO L225 Difference]: With dead ends: 6465 [2022-12-13 16:08:06,592 INFO L226 Difference]: Without dead ends: 6465 [2022-12-13 16:08:06,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 16:08:06,593 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1093 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:06,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 1168 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:08:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2022-12-13 16:08:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 2385. [2022-12-13 16:08:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2175925925925926) internal successors, (2893), 2384 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2893 transitions. [2022-12-13 16:08:06,618 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2893 transitions. Word has length 111 [2022-12-13 16:08:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:06,618 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2893 transitions. [2022-12-13 16:08:06,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2893 transitions. [2022-12-13 16:08:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-13 16:08:06,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:06,620 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:06,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 16:08:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:08:06,820 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1146584722, now seen corresponding path program 1 times [2022-12-13 16:08:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120874422] [2022-12-13 16:08:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 16:08:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120874422] [2022-12-13 16:08:06,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120874422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188824334] [2022-12-13 16:08:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:06,973 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:06,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 16:08:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:08:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:07,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:07,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188824334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:07,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:07,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-12-13 16:08:07,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408584834] [2022-12-13 16:08:07,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:08:07,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:08:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:08:07,226 INFO L87 Difference]: Start difference. First operand 2385 states and 2893 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:07,841 INFO L93 Difference]: Finished difference Result 5270 states and 6298 transitions. [2022-12-13 16:08:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 16:08:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-12-13 16:08:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:07,844 INFO L225 Difference]: With dead ends: 5270 [2022-12-13 16:08:07,844 INFO L226 Difference]: Without dead ends: 5270 [2022-12-13 16:08:07,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 16:08:07,845 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 564 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:07,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1267 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:08:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2022-12-13 16:08:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 2385. [2022-12-13 16:08:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2146464646464648) internal successors, (2886), 2384 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2886 transitions. [2022-12-13 16:08:07,866 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2886 transitions. Word has length 112 [2022-12-13 16:08:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:07,866 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2886 transitions. [2022-12-13 16:08:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2886 transitions. [2022-12-13 16:08:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 16:08:07,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:07,867 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:07,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 16:08:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:08:08,068 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1937224330, now seen corresponding path program 1 times [2022-12-13 16:08:08,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737026460] [2022-12-13 16:08:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:08,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:08,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737026460] [2022-12-13 16:08:08,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737026460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:08,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728450170] [2022-12-13 16:08:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:08,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:08,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:08,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 16:08:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:08:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:08,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:08,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728450170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:08,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:08,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 16:08:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325369454] [2022-12-13 16:08:08,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:08:08,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:08:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:08:08,611 INFO L87 Difference]: Start difference. First operand 2385 states and 2886 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:08,755 INFO L93 Difference]: Finished difference Result 4569 states and 5488 transitions. [2022-12-13 16:08:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:08:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-12-13 16:08:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:08,758 INFO L225 Difference]: With dead ends: 4569 [2022-12-13 16:08:08,758 INFO L226 Difference]: Without dead ends: 4569 [2022-12-13 16:08:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:08:08,759 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 537 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:08,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 266 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-12-13 16:08:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 2386. [2022-12-13 16:08:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2377 states have (on average 1.2145561632309634) internal successors, (2887), 2385 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2887 transitions. [2022-12-13 16:08:08,781 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2887 transitions. Word has length 114 [2022-12-13 16:08:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:08,781 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 2887 transitions. [2022-12-13 16:08:08,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2887 transitions. [2022-12-13 16:08:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-13 16:08:08,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:08,783 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:08,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 16:08:08,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:08,984 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash -374280255, now seen corresponding path program 1 times [2022-12-13 16:08:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294637441] [2022-12-13 16:08:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:08,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 41 proven. 275 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 16:08:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294637441] [2022-12-13 16:08:09,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294637441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015166285] [2022-12-13 16:08:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:09,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:09,942 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:09,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 16:08:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 16:08:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:10,379 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 11 treesize of output 7 [2022-12-13 16:08:10,382 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 11 treesize of output 7 [2022-12-13 16:08:10,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:10,434 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 17 treesize of output 15 [2022-12-13 16:08:10,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:10,438 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 17 treesize of output 15 [2022-12-13 16:08:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:10,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:10,540 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 12 treesize of output 10 [2022-12-13 16:08:10,543 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 18 treesize of output 16 [2022-12-13 16:08:10,549 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 12 treesize of output 10 [2022-12-13 16:08:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:08:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015166285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:10,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 25 [2022-12-13 16:08:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055642042] [2022-12-13 16:08:10,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:08:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:08:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:08:10,857 INFO L87 Difference]: Start difference. First operand 2386 states and 2887 transitions. Second operand has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:13,525 INFO L93 Difference]: Finished difference Result 7362 states and 8650 transitions. [2022-12-13 16:08:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 16:08:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-12-13 16:08:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:13,529 INFO L225 Difference]: With dead ends: 7362 [2022-12-13 16:08:13,529 INFO L226 Difference]: Without dead ends: 7362 [2022-12-13 16:08:13,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1119, Invalid=4581, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 16:08:13,531 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1359 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:13,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 2376 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 16:08:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2022-12-13 16:08:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 2950. [2022-12-13 16:08:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2941 states have (on average 1.213532811968718) internal successors, (3569), 2949 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3569 transitions. [2022-12-13 16:08:13,557 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3569 transitions. Word has length 117 [2022-12-13 16:08:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:13,557 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 3569 transitions. [2022-12-13 16:08:13,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3569 transitions. [2022-12-13 16:08:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-13 16:08:13,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:13,558 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:13,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 16:08:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:13,759 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 779532359, now seen corresponding path program 1 times [2022-12-13 16:08:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:13,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770442382] [2022-12-13 16:08:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 313 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:08:14,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770442382] [2022-12-13 16:08:14,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770442382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900658490] [2022-12-13 16:08:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:14,206 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:14,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 16:08:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 16:08:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:14,446 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 13 treesize of output 9 [2022-12-13 16:08:14,449 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 13 treesize of output 9 [2022-12-13 16:08:14,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:14,587 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 17 treesize of output 15 [2022-12-13 16:08:14,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:14,592 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 17 treesize of output 15 [2022-12-13 16:08:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:08:14,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:15,311 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 14 treesize of output 12 [2022-12-13 16:08:15,314 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 20 treesize of output 16 [2022-12-13 16:08:15,325 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 14 treesize of output 12 [2022-12-13 16:08:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:08:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:08:15,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900658490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:15,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:15,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-12-13 16:08:15,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120179223] [2022-12-13 16:08:15,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:15,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:08:15,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:08:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:08:15,577 INFO L87 Difference]: Start difference. First operand 2950 states and 3569 transitions. Second operand has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:17,897 INFO L93 Difference]: Finished difference Result 15206 states and 17825 transitions. [2022-12-13 16:08:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 16:08:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-12-13 16:08:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:17,906 INFO L225 Difference]: With dead ends: 15206 [2022-12-13 16:08:17,906 INFO L226 Difference]: Without dead ends: 15206 [2022-12-13 16:08:17,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1155, Invalid=6155, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 16:08:17,907 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 2280 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2280 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:17,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2280 Valid, 2999 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 16:08:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2022-12-13 16:08:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 8278. [2022-12-13 16:08:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8278 states, 8269 states have (on average 1.207159269561011) internal successors, (9982), 8277 states have internal predecessors, (9982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8278 states to 8278 states and 9982 transitions. [2022-12-13 16:08:17,988 INFO L78 Accepts]: Start accepts. Automaton has 8278 states and 9982 transitions. Word has length 117 [2022-12-13 16:08:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:17,989 INFO L495 AbstractCegarLoop]: Abstraction has 8278 states and 9982 transitions. [2022-12-13 16:08:17,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8278 states and 9982 transitions. [2022-12-13 16:08:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 16:08:17,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:17,991 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:17,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:08:18,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 16:08:18,192 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1282212589, now seen corresponding path program 1 times [2022-12-13 16:08:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:18,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936237664] [2022-12-13 16:08:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936237664] [2022-12-13 16:08:18,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936237664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245367623] [2022-12-13 16:08:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:18,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:18,360 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:18,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:08:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 16:08:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:18,595 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 13 treesize of output 9 [2022-12-13 16:08:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 16:08:18,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:18,702 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_28 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_28) 0)) (= (store |c_#valid| v_~x1~0.base_28 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-12-13 16:08:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 97 trivial. 48 not checked. [2022-12-13 16:08:18,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245367623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:18,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:18,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-12-13 16:08:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034849175] [2022-12-13 16:08:18,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:18,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:08:18,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:08:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2022-12-13 16:08:18,717 INFO L87 Difference]: Start difference. First operand 8278 states and 9982 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:19,021 INFO L93 Difference]: Finished difference Result 18955 states and 22785 transitions. [2022-12-13 16:08:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:08:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-12-13 16:08:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:19,041 INFO L225 Difference]: With dead ends: 18955 [2022-12-13 16:08:19,041 INFO L226 Difference]: Without dead ends: 18937 [2022-12-13 16:08:19,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=201, Unknown=1, NotChecked=30, Total=306 [2022-12-13 16:08:19,042 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 412 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:19,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 656 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 216 Unchecked, 0.2s Time] [2022-12-13 16:08:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2022-12-13 16:08:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 14041. [2022-12-13 16:08:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14041 states, 14032 states have (on average 1.206171607753706) internal successors, (16925), 14040 states have internal predecessors, (16925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14041 states to 14041 states and 16925 transitions. [2022-12-13 16:08:19,194 INFO L78 Accepts]: Start accepts. Automaton has 14041 states and 16925 transitions. Word has length 118 [2022-12-13 16:08:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:19,194 INFO L495 AbstractCegarLoop]: Abstraction has 14041 states and 16925 transitions. [2022-12-13 16:08:19,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14041 states and 16925 transitions. [2022-12-13 16:08:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 16:08:19,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:19,203 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 8, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:19,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:08:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 16:08:19,404 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash -224880734, now seen corresponding path program 1 times [2022-12-13 16:08:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641018271] [2022-12-13 16:08:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-12-13 16:08:19,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641018271] [2022-12-13 16:08:19,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641018271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183218255] [2022-12-13 16:08:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:19,631 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:19,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:08:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:08:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-12-13 16:08:19,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-12-13 16:08:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183218255] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:19,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:08:19,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 9 [2022-12-13 16:08:19,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795220426] [2022-12-13 16:08:19,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:08:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:08:19,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:08:19,838 INFO L87 Difference]: Start difference. First operand 14041 states and 16925 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:19,911 INFO L93 Difference]: Finished difference Result 10162 states and 12168 transitions. [2022-12-13 16:08:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:08:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-12-13 16:08:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:19,921 INFO L225 Difference]: With dead ends: 10162 [2022-12-13 16:08:19,921 INFO L226 Difference]: Without dead ends: 10162 [2022-12-13 16:08:19,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:08:19,922 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 126 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:19,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 464 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:08:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2022-12-13 16:08:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 8827. [2022-12-13 16:08:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8818 states have (on average 1.1958493989566794) internal successors, (10545), 8826 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 10545 transitions. [2022-12-13 16:08:20,011 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 10545 transitions. Word has length 146 [2022-12-13 16:08:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:20,012 INFO L495 AbstractCegarLoop]: Abstraction has 8827 states and 10545 transitions. [2022-12-13 16:08:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 10545 transitions. [2022-12-13 16:08:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-13 16:08:20,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:20,017 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 9, 9, 7, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:20,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:20,218 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 368256012, now seen corresponding path program 2 times [2022-12-13 16:08:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:20,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774640634] [2022-12-13 16:08:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-12-13 16:08:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774640634] [2022-12-13 16:08:20,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774640634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431821300] [2022-12-13 16:08:20,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:08:20,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:20,437 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:20,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:08:20,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:08:20,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:08:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 16:08:20,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 16:08:20,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431821300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:20,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:20,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 16:08:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214797688] [2022-12-13 16:08:20,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:08:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:08:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:08:20,716 INFO L87 Difference]: Start difference. First operand 8827 states and 10545 transitions. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:08:20,903 INFO L93 Difference]: Finished difference Result 10609 states and 12209 transitions. [2022-12-13 16:08:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:08:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-12-13 16:08:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:08:20,911 INFO L225 Difference]: With dead ends: 10609 [2022-12-13 16:08:20,911 INFO L226 Difference]: Without dead ends: 10609 [2022-12-13 16:08:20,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:08:20,912 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 858 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:08:20,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1733 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:08:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2022-12-13 16:08:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 7447. [2022-12-13 16:08:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7447 states, 7438 states have (on average 1.1560903468674375) internal successors, (8599), 7446 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7447 states to 7447 states and 8599 transitions. [2022-12-13 16:08:20,971 INFO L78 Accepts]: Start accepts. Automaton has 7447 states and 8599 transitions. Word has length 155 [2022-12-13 16:08:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:08:20,971 INFO L495 AbstractCegarLoop]: Abstraction has 7447 states and 8599 transitions. [2022-12-13 16:08:20,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7447 states and 8599 transitions. [2022-12-13 16:08:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-13 16:08:20,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:08:20,974 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:21,174 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:08:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1761139834, now seen corresponding path program 1 times [2022-12-13 16:08:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:21,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067578164] [2022-12-13 16:08:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 679 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:08:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067578164] [2022-12-13 16:08:22,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067578164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253653799] [2022-12-13 16:08:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:22,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:22,004 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:22,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:08:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 16:08:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:22,174 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 [2022-12-13 16:08:22,275 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 13 treesize of output 9 [2022-12-13 16:08:22,279 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 13 treesize of output 9 [2022-12-13 16:08:22,423 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:08:22,423 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 11 treesize of output 11 [2022-12-13 16:08:22,431 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 14 treesize of output 16 [2022-12-13 16:08:22,437 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 14 treesize of output 16 [2022-12-13 16:08:22,446 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 14 treesize of output 16 [2022-12-13 16:08:22,449 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 14 treesize of output 16 [2022-12-13 16:08:22,488 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 14 treesize of output 16 [2022-12-13 16:08:22,493 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 14 treesize of output 16 [2022-12-13 16:08:22,598 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 14 treesize of output 16 [2022-12-13 16:08:22,601 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 14 treesize of output 16 [2022-12-13 16:08:22,686 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 [2022-12-13 16:08:22,688 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 [2022-12-13 16:08:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 673 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 16:08:22,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:22,909 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1343) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1342) c_~S~0.base) .cse0) 0)))) is different from false [2022-12-13 16:08:23,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:23,333 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:08:23,336 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 36 treesize of output 24 [2022-12-13 16:08:23,339 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 7 [2022-12-13 16:08:23,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:08:23,348 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:08:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:08:23,351 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 20 treesize of output 8 [2022-12-13 16:08:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 443 refuted. 0 times theorem prover too weak. 56 trivial. 240 not checked. [2022-12-13 16:08:23,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253653799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:23,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:23,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-12-13 16:08:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892826696] [2022-12-13 16:08:23,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:23,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:08:23,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:08:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=447, Unknown=2, NotChecked=42, Total=552 [2022-12-13 16:08:23,641 INFO L87 Difference]: Start difference. First operand 7447 states and 8599 transitions. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:37,638 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:08:54,104 WARN L233 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:08:59,834 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:09:01,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:09:13,615 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:09:25,802 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:09:26,683 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1343) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1342) c_~S~0.base) .cse0) 0)) (= c_~x4~0.offset 0) (= c_~x4~0.base 0) (forall ((v_~x1~0.base_30 Int)) (or (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_30 v_ArrVal_1342) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_30) 0)))) (= c_~x1~0.offset 0) (= c_~t1~0.base 0) (forall ((v_~x1~0.base_30 Int)) (or (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_30 v_ArrVal_1343) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_30) 0)))))) is different from false [2022-12-13 16:09:26,725 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1343) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1342) c_~S~0.base) .cse0) 0)) (= c_~t4~0.base 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (forall ((v_~x1~0.base_30 Int)) (or (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_30 v_ArrVal_1342) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_30) 0)))) (= c_~x1~0.offset 0) (= c_~t1~0.base 0) (forall ((v_~x1~0.base_30 Int)) (or (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_30 v_ArrVal_1343) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_30) 0)))))) is different from false [2022-12-13 16:09:42,324 WARN L233 SmtUtils]: Spent 13.81s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:09:51,837 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:10:08,439 WARN L233 SmtUtils]: Spent 16.09s on a formula simplification. DAG size of input: 64 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:10:09,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:10:10,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:10:24,466 WARN L233 SmtUtils]: Spent 13.17s on a formula simplification. DAG size of input: 66 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:10:33,384 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:10:47,468 WARN L233 SmtUtils]: Spent 13.25s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:10:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:47,591 INFO L93 Difference]: Finished difference Result 40085 states and 45478 transitions. [2022-12-13 16:10:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-13 16:10:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-13 16:10:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:47,613 INFO L225 Difference]: With dead ends: 40085 [2022-12-13 16:10:47,614 INFO L226 Difference]: Without dead ends: 40085 [2022-12-13 16:10:47,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 317 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 6018 ImplicationChecksByTransitivity, 134.4s TimeCoverageRelationStatistics Valid=1733, Invalid=14698, Unknown=93, NotChecked=768, Total=17292 [2022-12-13 16:10:47,616 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 2502 mSDsluCounter, 6311 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 103 mSolverCounterUnsat, 139 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 6664 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 139 IncrementalHoareTripleChecker+Unknown, 948 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:47,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2502 Valid, 6664 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2893 Invalid, 139 Unknown, 948 Unchecked, 9.6s Time] [2022-12-13 16:10:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40085 states. [2022-12-13 16:10:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40085 to 15984. [2022-12-13 16:10:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15984 states, 15975 states have (on average 1.1479186228482003) internal successors, (18338), 15983 states have internal predecessors, (18338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15984 states to 15984 states and 18338 transitions. [2022-12-13 16:10:47,809 INFO L78 Accepts]: Start accepts. Automaton has 15984 states and 18338 transitions. Word has length 162 [2022-12-13 16:10:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:47,809 INFO L495 AbstractCegarLoop]: Abstraction has 15984 states and 18338 transitions. [2022-12-13 16:10:47,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 15984 states and 18338 transitions. [2022-12-13 16:10:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-13 16:10:47,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:47,814 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:10:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 16:10:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:48,015 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:10:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586310, now seen corresponding path program 2 times [2022-12-13 16:10:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:48,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700076771] [2022-12-13 16:10:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 685 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 16:10:48,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:48,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700076771] [2022-12-13 16:10:48,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700076771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:10:48,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027368973] [2022-12-13 16:10:48,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:10:48,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:10:48,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:10:48,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:10:48,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:10:48,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:10:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 16:10:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:10:48,884 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 [2022-12-13 16:10:49,009 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 13 treesize of output 9 [2022-12-13 16:10:49,012 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 13 treesize of output 9 [2022-12-13 16:10:49,154 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:10:49,154 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 11 treesize of output 11 [2022-12-13 16:10:49,161 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 14 treesize of output 16 [2022-12-13 16:10:49,166 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 14 treesize of output 16 [2022-12-13 16:10:49,173 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 14 treesize of output 16 [2022-12-13 16:10:49,178 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 14 treesize of output 16 [2022-12-13 16:10:49,219 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 14 treesize of output 16 [2022-12-13 16:10:49,223 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 14 treesize of output 16 [2022-12-13 16:10:49,360 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 16 treesize of output 18 [2022-12-13 16:10:49,363 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 16 treesize of output 18 [2022-12-13 16:10:49,436 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 [2022-12-13 16:10:49,439 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 [2022-12-13 16:10:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 679 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 16:10:49,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:10:49,659 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~t4~0.offset 4))) (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~t4~0.base) .cse0) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~t4~0.base) .cse0) 0)))) is different from false [2022-12-13 16:10:49,688 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))))) is different from false [2022-12-13 16:10:50,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:10:50,004 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:10:50,006 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 36 treesize of output 24 [2022-12-13 16:10:50,008 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 7 [2022-12-13 16:10:50,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:10:50,016 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:10:50,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:10:50,018 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 20 treesize of output 8 [2022-12-13 16:10:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 381 refuted. 0 times theorem prover too weak. 50 trivial. 308 not checked. [2022-12-13 16:10:50,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027368973] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:10:50,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:10:50,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-12-13 16:10:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55322917] [2022-12-13 16:10:50,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:10:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:10:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:10:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=409, Unknown=3, NotChecked=82, Total=552 [2022-12-13 16:10:50,254 INFO L87 Difference]: Start difference. First operand 15984 states and 18338 transitions. Second operand has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:04,024 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:11:20,128 WARN L233 SmtUtils]: Spent 13.20s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:11:33,016 WARN L233 SmtUtils]: Spent 12.85s on a formula simplification. DAG size of input: 64 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:11:45,686 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:11:46,366 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 c_~x1~0.offset)) (.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (= (select (select |c_#memory_$Pointer$.base| c_~x1~0.base) .cse1) 0) (= c_~t1~0.offset 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (= (select (select |c_#memory_$Pointer$.offset| c_~x1~0.base) .cse1) 0) (= c_~x1~0.offset 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))) (= c_~t1~0.base 0))) is different from false [2022-12-13 16:11:59,442 WARN L233 SmtUtils]: Spent 12.83s on a formula simplification. DAG size of input: 66 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:14,428 WARN L233 SmtUtils]: Spent 13.24s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:27,446 WARN L233 SmtUtils]: Spent 12.97s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:27,932 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 c_~x1~0.offset)) (.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (= (select (select |c_#memory_$Pointer$.base| c_~x1~0.base) .cse1) 0) (= (select (select |c_#memory_$Pointer$.offset| c_~x1~0.base) .cse1) 0) (= c_~x1~0.offset 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))))) is different from false [2022-12-13 16:12:28,102 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~x4~0.offset 0) (= c_~x4~0.base 0) (= c_~x1~0.offset 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))) (= c_~t1~0.base 0))) is different from false [2022-12-13 16:12:28,122 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (= c_~t4~0.base 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1472) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (= c_~x1~0.offset 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))) (= c_~t1~0.base 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1471) c_~S~0.base) .cse0) 0)))))) is different from false [2022-12-13 16:12:42,840 WARN L233 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:42,859 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 c_~x1~0.offset)) (.cse1 (+ c_~t4~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (= (select (select |c_#memory_$Pointer$.base| c_~x1~0.base) .cse0) 0) (= c_~t1~0.offset 0) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~t4~0.base) .cse1) 0)) (= (select (select |c_#memory_$Pointer$.offset| c_~x1~0.base) .cse0) 0) (= c_~x1~0.offset 0) (= c_~t1~0.base 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~t4~0.base) .cse1) 0)))) is different from false [2022-12-13 16:12:42,864 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4)) (.cse1 (+ 4 c_~x1~0.offset))) (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1471) c_~x1~0.base) .cse1) 0)))) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1472) c_~x1~0.base) .cse1) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))))) is different from false [2022-12-13 16:12:50,158 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:50,212 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= 1 (select |c_#valid| c_~x1~0.base)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (= c_~t1~0.offset 0) (forall ((v_~x1~0.base_32 Int)) (or (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_32 v_ArrVal_1472) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_32) 0)))) (= c_~x1~0.offset 0) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))) (= c_~t1~0.base 0) (forall ((v_~x1~0.base_32 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_32) 0)) (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_32 v_ArrVal_1471) c_~S~0.base) .cse0) 0)))))) is different from false [2022-12-13 16:12:58,349 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:13:11,428 WARN L233 SmtUtils]: Spent 12.87s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:13:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:11,519 INFO L93 Difference]: Finished difference Result 75039 states and 85283 transitions. [2022-12-13 16:13:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-12-13 16:13:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-13 16:13:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:11,572 INFO L225 Difference]: With dead ends: 75039 [2022-12-13 16:13:11,572 INFO L226 Difference]: Without dead ends: 75039 [2022-12-13 16:13:11,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 317 SyntacticMatches, 5 SemanticMatches, 209 ConstructedPredicates, 9 IntricatePredicates, 18 DeprecatedPredicates, 17763 ImplicationChecksByTransitivity, 138.4s TimeCoverageRelationStatistics Valid=4634, Invalid=35914, Unknown=90, NotChecked=3672, Total=44310 [2022-12-13 16:13:11,577 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 3439 mSDsluCounter, 5695 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 225 mSolverCounterUnsat, 121 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 6082 SdHoareTripleChecker+Invalid, 5985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 121 IncrementalHoareTripleChecker+Unknown, 3242 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:11,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 6082 Invalid, 5985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2397 Invalid, 121 Unknown, 3242 Unchecked, 2.7s Time] [2022-12-13 16:13:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75039 states. [2022-12-13 16:13:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75039 to 36221. [2022-12-13 16:13:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36221 states, 36212 states have (on average 1.1465536286313929) internal successors, (41519), 36220 states have internal predecessors, (41519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36221 states to 36221 states and 41519 transitions. [2022-12-13 16:13:12,092 INFO L78 Accepts]: Start accepts. Automaton has 36221 states and 41519 transitions. Word has length 162 [2022-12-13 16:13:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:12,092 INFO L495 AbstractCegarLoop]: Abstraction has 36221 states and 41519 transitions. [2022-12-13 16:13:12,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 36221 states and 41519 transitions. [2022-12-13 16:13:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-13 16:13:12,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:12,110 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:13:12,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 16:13:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 16:13:12,312 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:13:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1229648570, now seen corresponding path program 3 times [2022-12-13 16:13:12,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:12,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580146504] [2022-12-13 16:13:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 681 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 16:13:13,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580146504] [2022-12-13 16:13:13,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580146504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23245789] [2022-12-13 16:13:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:13:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:13,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:13,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 16:13:13,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 16:13:13,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:13:13,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 16:13:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:13,375 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 [2022-12-13 16:13:13,481 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 13 treesize of output 9 [2022-12-13 16:13:13,486 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 13 treesize of output 9 [2022-12-13 16:13:13,738 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:13:13,738 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 11 treesize of output 11 [2022-12-13 16:13:13,761 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 14 treesize of output 16 [2022-12-13 16:13:13,766 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 14 treesize of output 16 [2022-12-13 16:13:13,774 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 14 treesize of output 16 [2022-12-13 16:13:13,780 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 14 treesize of output 16 [2022-12-13 16:13:13,817 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 14 treesize of output 16 [2022-12-13 16:13:13,821 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 14 treesize of output 16 [2022-12-13 16:13:13,889 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 14 treesize of output 16 [2022-12-13 16:13:13,892 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 14 treesize of output 16 [2022-12-13 16:13:13,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:13:13,952 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 17 treesize of output 19 [2022-12-13 16:13:13,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:13:13,962 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 17 treesize of output 19 [2022-12-13 16:13:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 134 proven. 617 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 16:13:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:14,249 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)))) is different from false [2022-12-13 16:13:14,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:13:14,728 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:13:14,730 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 36 treesize of output 24 [2022-12-13 16:13:14,734 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 7 [2022-12-13 16:13:14,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:13:14,744 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:13:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:13:14,747 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 20 treesize of output 8 [2022-12-13 16:13:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 421 refuted. 0 times theorem prover too weak. 78 trivial. 240 not checked. [2022-12-13 16:13:15,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23245789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:15,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:15,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-12-13 16:13:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340906220] [2022-12-13 16:13:15,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:13:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:13:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=579, Unknown=1, NotChecked=48, Total=702 [2022-12-13 16:13:15,010 INFO L87 Difference]: Start difference. First operand 36221 states and 41519 transitions. Second operand has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:23,582 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4)) (.cse1 (+ c_~t4~0.offset 4))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~S~0.base) .cse0) 0)))) (= (select |c_#valid| c_~t4~0.base) 1) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (= (select (select |c_#memory_$Pointer$.offset| c_~t4~0.base) .cse1) 0) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (or (and (= |c_ULTIMATE.start_pop_#t~mem8#1.base| 0) (= |c_ULTIMATE.start_pop_#t~mem8#1.offset| 0)) (not (= c_~S~0.base c_~t4~0.base)) (not (= c_~S~0.offset c_~t4~0.offset))) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (= (select (select |c_#memory_$Pointer$.base| c_~t4~0.base) .cse1) 0) (not (= c_~x1~0.base c_~t4~0.base)))) is different from false [2022-12-13 16:13:27,195 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~S~0.base) .cse0) 0)))) (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) (not (= c_~S~0.base c_~t4~0.base)) (not (= c_~S~0.offset c_~t4~0.offset))) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)))) is different from false [2022-12-13 16:13:27,229 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~S~0.base) .cse0) 0)))) (= c_~t4~0.base 0) (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)))) is different from false [2022-12-13 16:13:28,028 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (or (not (= c_~S~0.offset c_~t1~0.offset)) (not (= c_~t1~0.base c_~S~0.base)) (let ((.cse1 (+ 4 c_~x1~0.offset))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~x1~0.base) .cse1) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~x1~0.base) .cse1) 0))))))))) is different from false [2022-12-13 16:13:32,896 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= c_~S~0.base c_~t4~0.base))) (.cse1 (not (= c_~S~0.offset c_~t4~0.offset))) (.cse2 (+ c_~S~0.offset 4))) (and (or (and (= c_~x4~0.offset 0) (= c_~x4~0.base 0)) .cse0 .cse1) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse2) 0)) (or (and (= |c_ULTIMATE.start_pop_#t~mem8#1.base| 0) (= |c_ULTIMATE.start_pop_#t~mem8#1.offset| 0)) .cse0 .cse1) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse2) 0)) (or (not (= c_~S~0.offset c_~t1~0.offset)) (not (= c_~t1~0.base c_~S~0.base)) (let ((.cse3 (+ 4 c_~x1~0.offset))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~x1~0.base) .cse3) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~x1~0.base) .cse3) 0))))))))) is different from false [2022-12-13 16:13:46,094 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (= c_~x4~0.offset 0) (= c_~t4~0.offset 0) (= c_~x4~0.base 0) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (or (and (= |c_ULTIMATE.start_pop_#t~mem8#1.base| 0) (= |c_ULTIMATE.start_pop_#t~mem8#1.offset| 0)) (not (= c_~S~0.base c_~t4~0.base)) (not (= c_~S~0.offset c_~t4~0.offset))) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)) (or (not (= c_~S~0.offset c_~t1~0.offset)) (not (= c_~t1~0.base c_~S~0.base)) (let ((.cse1 (+ 4 c_~x1~0.offset))) (and (forall ((v_~x1~0.base_34 Int)) (or (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| v_~x1~0.base_34 v_ArrVal_1600) c_~x1~0.base) .cse1) 0)) (not (= (select |c_#valid| v_~x1~0.base_34) 0)))) (forall ((v_~x1~0.base_34 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_34) 0)) (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_34 v_ArrVal_1601) c_~x1~0.base) .cse1) 0))))))))) is different from false [2022-12-13 16:13:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:59,379 INFO L93 Difference]: Finished difference Result 267224 states and 303407 transitions. [2022-12-13 16:13:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 488 states. [2022-12-13 16:13:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-13 16:13:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:59,606 INFO L225 Difference]: With dead ends: 267224 [2022-12-13 16:13:59,606 INFO L226 Difference]: Without dead ends: 267224 [2022-12-13 16:13:59,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 315 SyntacticMatches, 21 SemanticMatches, 500 ConstructedPredicates, 7 IntricatePredicates, 21 DeprecatedPredicates, 116827 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=25479, Invalid=218647, Unknown=432, NotChecked=6944, Total=251502 [2022-12-13 16:13:59,622 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 4626 mSDsluCounter, 10175 mSDsCounter, 0 mSdLazyCounter, 4955 mSolverCounterSat, 374 mSolverCounterUnsat, 258 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4626 SdHoareTripleChecker+Valid, 10738 SdHoareTripleChecker+Invalid, 6620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 4955 IncrementalHoareTripleChecker+Invalid, 258 IncrementalHoareTripleChecker+Unknown, 1033 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4626 Valid, 10738 Invalid, 6620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [374 Valid, 4955 Invalid, 258 Unknown, 1033 Unchecked, 5.2s Time] [2022-12-13 16:13:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267224 states. [2022-12-13 16:14:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267224 to 139324. [2022-12-13 16:14:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139324 states, 139315 states have (on average 1.1445357642752036) internal successors, (159451), 139323 states have internal predecessors, (159451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139324 states to 139324 states and 159451 transitions. [2022-12-13 16:14:01,575 INFO L78 Accepts]: Start accepts. Automaton has 139324 states and 159451 transitions. Word has length 162 [2022-12-13 16:14:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:01,575 INFO L495 AbstractCegarLoop]: Abstraction has 139324 states and 159451 transitions. [2022-12-13 16:14:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 139324 states and 159451 transitions. [2022-12-13 16:14:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-13 16:14:01,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:01,592 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:01,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 16:14:01,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 16:14:01,793 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:14:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash -115562864, now seen corresponding path program 4 times [2022-12-13 16:14:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:01,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412509606] [2022-12-13 16:14:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 118 proven. 743 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 16:14:02,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412509606] [2022-12-13 16:14:02,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412509606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080050012] [2022-12-13 16:14:02,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:14:02,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:02,407 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:02,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 16:14:02,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:14:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:14:02,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:14:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:02,540 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 [2022-12-13 16:14:02,593 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:14:02,593 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 [2022-12-13 16:14:02,693 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 13 treesize of output 9 [2022-12-13 16:14:02,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:02,861 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 27 treesize of output 21 [2022-12-13 16:14:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 779 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 16:14:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:03,428 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 14 [2022-12-13 16:14:03,431 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 24 treesize of output 20 [2022-12-13 16:14:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 773 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 16:14:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080050012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:03,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:03,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-12-13 16:14:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347443443] [2022-12-13 16:14:03,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:14:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:14:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:14:03,963 INFO L87 Difference]: Start difference. First operand 139324 states and 159451 transitions. Second operand has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:07,275 INFO L93 Difference]: Finished difference Result 403551 states and 459373 transitions. [2022-12-13 16:14:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 16:14:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-12-13 16:14:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:07,859 INFO L225 Difference]: With dead ends: 403551 [2022-12-13 16:14:07,859 INFO L226 Difference]: Without dead ends: 403551 [2022-12-13 16:14:07,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1608, Invalid=5364, Unknown=0, NotChecked=0, Total=6972 [2022-12-13 16:14:07,860 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1294 mSDsluCounter, 4142 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 4417 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 16:14:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403551 states. [2022-12-13 16:14:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403551 to 240983. [2022-12-13 16:14:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240983 states, 240974 states have (on average 1.1472814494509782) internal successors, (276465), 240982 states have internal predecessors, (276465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240983 states to 240983 states and 276465 transitions. [2022-12-13 16:14:11,862 INFO L78 Accepts]: Start accepts. Automaton has 240983 states and 276465 transitions. Word has length 173 [2022-12-13 16:14:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:11,863 INFO L495 AbstractCegarLoop]: Abstraction has 240983 states and 276465 transitions. [2022-12-13 16:14:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 240983 states and 276465 transitions. [2022-12-13 16:14:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-13 16:14:11,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:11,885 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:11,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 16:14:12,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 16:14:12,092 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:14:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:12,096 INFO L85 PathProgramCache]: Analyzing trace with hash -115562863, now seen corresponding path program 1 times [2022-12-13 16:14:12,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:12,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738878139] [2022-12-13 16:14:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:12,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 16:14:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738878139] [2022-12-13 16:14:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738878139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739800292] [2022-12-13 16:14:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:13,224 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:13,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 16:14:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:14:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:13,381 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 [2022-12-13 16:14:13,563 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:14:13,564 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 [2022-12-13 16:14:13,574 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:14:13,574 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 11 treesize of output 11 [2022-12-13 16:14:13,702 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 13 treesize of output 9 [2022-12-13 16:14:13,706 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 13 treesize of output 9 [2022-12-13 16:14:13,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:13,904 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 27 treesize of output 21 [2022-12-13 16:14:13,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:14:13,912 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 17 treesize of output 15 [2022-12-13 16:14:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 787 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 16:14:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:14,771 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 14 [2022-12-13 16:14:14,774 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 24 treesize of output 20 [2022-12-13 16:14:14,782 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 29 treesize of output 27 [2022-12-13 16:14:14,785 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 27 treesize of output 25 [2022-12-13 16:14:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:14:23,332 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:14:23,562 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 50 treesize of output 46 [2022-12-13 16:14:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 781 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 16:14:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739800292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:23,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:23,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2022-12-13 16:14:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932153914] [2022-12-13 16:14:23,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:23,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 16:14:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 16:14:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 16:14:23,624 INFO L87 Difference]: Start difference. First operand 240983 states and 276465 transitions. Second operand has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:47,747 INFO L93 Difference]: Finished difference Result 878861 states and 999605 transitions. [2022-12-13 16:14:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2022-12-13 16:14:47,748 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-12-13 16:14:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:48,727 INFO L225 Difference]: With dead ends: 878861 [2022-12-13 16:14:48,728 INFO L226 Difference]: Without dead ends: 878861 [2022-12-13 16:14:48,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39597 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=19166, Invalid=75390, Unknown=0, NotChecked=0, Total=94556 [2022-12-13 16:14:48,732 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 5967 mSDsluCounter, 6741 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5967 SdHoareTripleChecker+Valid, 7191 SdHoareTripleChecker+Invalid, 4133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:48,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5967 Valid, 7191 Invalid, 4133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3862 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 16:14:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878861 states. [2022-12-13 16:14:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878861 to 400490. [2022-12-13 16:14:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400490 states, 400481 states have (on average 1.146875881752193) internal successors, (459302), 400489 states have internal predecessors, (459302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400490 states to 400490 states and 459302 transitions. [2022-12-13 16:14:55,731 INFO L78 Accepts]: Start accepts. Automaton has 400490 states and 459302 transitions. Word has length 173 [2022-12-13 16:14:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:55,731 INFO L495 AbstractCegarLoop]: Abstraction has 400490 states and 459302 transitions. [2022-12-13 16:14:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 400490 states and 459302 transitions. [2022-12-13 16:14:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-13 16:14:55,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:55,750 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:14:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 16:14:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 16:14:55,951 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:14:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -695935548, now seen corresponding path program 2 times [2022-12-13 16:14:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307090083] [2022-12-13 16:14:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 56 proven. 736 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 16:14:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307090083] [2022-12-13 16:14:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307090083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259316877] [2022-12-13 16:14:56,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:14:56,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:56,777 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:56,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 16:14:56,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:14:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:14:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:14:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:57,099 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 13 treesize of output 9 [2022-12-13 16:14:57,234 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 16 treesize of output 8 [2022-12-13 16:14:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 121 proven. 653 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-13 16:14:57,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 94 proven. 643 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-13 16:14:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259316877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:57,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 24 [2022-12-13 16:14:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425690718] [2022-12-13 16:14:57,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:14:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:14:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:14:57,491 INFO L87 Difference]: Start difference. First operand 400490 states and 459302 transitions. Second operand has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:01,962 INFO L93 Difference]: Finished difference Result 629922 states and 717829 transitions. [2022-12-13 16:15:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-12-13 16:15:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-13 16:15:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:02,630 INFO L225 Difference]: With dead ends: 629922 [2022-12-13 16:15:02,631 INFO L226 Difference]: Without dead ends: 629922 [2022-12-13 16:15:02,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8386 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4703, Invalid=19789, Unknown=0, NotChecked=0, Total=24492 [2022-12-13 16:15:02,632 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1265 mSDsluCounter, 3736 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:02,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 4032 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 16:15:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629922 states. [2022-12-13 16:15:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629922 to 399823. [2022-12-13 16:15:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399823 states, 399814 states have (on average 1.1464981216265564) internal successors, (458386), 399822 states have internal predecessors, (458386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399823 states to 399823 states and 458386 transitions. [2022-12-13 16:15:08,280 INFO L78 Accepts]: Start accepts. Automaton has 399823 states and 458386 transitions. Word has length 174 [2022-12-13 16:15:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:08,280 INFO L495 AbstractCegarLoop]: Abstraction has 399823 states and 458386 transitions. [2022-12-13 16:15:08,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 399823 states and 458386 transitions. [2022-12-13 16:15:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-13 16:15:08,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:08,303 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:08,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 16:15:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:08,505 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:15:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1469366084, now seen corresponding path program 3 times [2022-12-13 16:15:08,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:08,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564338776] [2022-12-13 16:15:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:08,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 531 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-13 16:15:08,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564338776] [2022-12-13 16:15:08,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564338776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453607449] [2022-12-13 16:15:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:15:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:08,725 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:08,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 16:15:08,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 16:15:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:15:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:15:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:09,120 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 [2022-12-13 16:15:09,160 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:15:09,160 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 11 treesize of output 11 [2022-12-13 16:15:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-13 16:15:09,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-13 16:15:09,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453607449] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:09,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:09,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-12-13 16:15:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94890932] [2022-12-13 16:15:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:15:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:15:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:15:09,311 INFO L87 Difference]: Start difference. First operand 399823 states and 458386 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:10,509 INFO L93 Difference]: Finished difference Result 528511 states and 602815 transitions. [2022-12-13 16:15:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:15:10,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-13 16:15:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:11,041 INFO L225 Difference]: With dead ends: 528511 [2022-12-13 16:15:11,042 INFO L226 Difference]: Without dead ends: 528511 [2022-12-13 16:15:11,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:15:11,042 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 346 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:11,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 664 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:15:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528511 states. [2022-12-13 16:15:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528511 to 460099. [2022-12-13 16:15:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460099 states, 460090 states have (on average 1.143152426699124) internal successors, (525953), 460098 states have internal predecessors, (525953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460099 states to 460099 states and 525953 transitions. [2022-12-13 16:15:16,508 INFO L78 Accepts]: Start accepts. Automaton has 460099 states and 525953 transitions. Word has length 174 [2022-12-13 16:15:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:16,508 INFO L495 AbstractCegarLoop]: Abstraction has 460099 states and 525953 transitions. [2022-12-13 16:15:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 460099 states and 525953 transitions. [2022-12-13 16:15:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-13 16:15:16,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:16,524 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:16,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 16:15:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 16:15:16,726 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:15:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2129791236, now seen corresponding path program 4 times [2022-12-13 16:15:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201476728] [2022-12-13 16:15:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 523 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:15:17,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201476728] [2022-12-13 16:15:17,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201476728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559772416] [2022-12-13 16:15:17,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:15:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:17,126 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:17,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 16:15:17,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:15:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:15:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:15:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:17,281 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 [2022-12-13 16:15:17,333 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:15:17,334 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 11 treesize of output 11 [2022-12-13 16:15:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:15:17,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-13 16:15:17,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559772416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:17,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:17,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-12-13 16:15:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244955543] [2022-12-13 16:15:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:17,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:15:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:15:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:15:17,512 INFO L87 Difference]: Start difference. First operand 460099 states and 525953 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:18,702 INFO L93 Difference]: Finished difference Result 512044 states and 582857 transitions. [2022-12-13 16:15:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:15:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-13 16:15:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:19,188 INFO L225 Difference]: With dead ends: 512044 [2022-12-13 16:15:19,188 INFO L226 Difference]: Without dead ends: 512044 [2022-12-13 16:15:19,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:15:19,188 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 302 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 648 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:15:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512044 states. [2022-12-13 16:15:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512044 to 309057. [2022-12-13 16:15:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309057 states, 309048 states have (on average 1.145961145194274) internal successors, (354157), 309056 states have internal predecessors, (354157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309057 states to 309057 states and 354157 transitions. [2022-12-13 16:15:23,412 INFO L78 Accepts]: Start accepts. Automaton has 309057 states and 354157 transitions. Word has length 174 [2022-12-13 16:15:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:23,413 INFO L495 AbstractCegarLoop]: Abstraction has 309057 states and 354157 transitions. [2022-12-13 16:15:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 309057 states and 354157 transitions. [2022-12-13 16:15:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-13 16:15:23,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:23,425 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 7, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:23,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 16:15:23,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:23,626 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:15:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash -668697579, now seen corresponding path program 1 times [2022-12-13 16:15:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:23,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170373671] [2022-12-13 16:15:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 372 proven. 311 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-13 16:15:23,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170373671] [2022-12-13 16:15:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170373671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391985478] [2022-12-13 16:15:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:23,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:23,864 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 16:15:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 16:15:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-12-13 16:15:24,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-12-13 16:15:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391985478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:24,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:24,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-12-13 16:15:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661834426] [2022-12-13 16:15:24,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:24,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:15:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:15:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:15:24,090 INFO L87 Difference]: Start difference. First operand 309057 states and 354157 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:24,846 INFO L93 Difference]: Finished difference Result 88618 states and 101159 transitions. [2022-12-13 16:15:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 16:15:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-12-13 16:15:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:24,913 INFO L225 Difference]: With dead ends: 88618 [2022-12-13 16:15:24,914 INFO L226 Difference]: Without dead ends: 88618 [2022-12-13 16:15:24,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 16:15:24,914 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 509 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:24,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1625 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:15:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88618 states. [2022-12-13 16:15:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88618 to 36983. [2022-12-13 16:15:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36983 states, 36974 states have (on average 1.1342835506031266) internal successors, (41939), 36982 states have internal predecessors, (41939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36983 states to 36983 states and 41939 transitions. [2022-12-13 16:15:25,387 INFO L78 Accepts]: Start accepts. Automaton has 36983 states and 41939 transitions. Word has length 178 [2022-12-13 16:15:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:25,388 INFO L495 AbstractCegarLoop]: Abstraction has 36983 states and 41939 transitions. [2022-12-13 16:15:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 36983 states and 41939 transitions. [2022-12-13 16:15:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-13 16:15:25,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:25,397 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:15:25,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 16:15:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:25,598 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:15:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1498211354, now seen corresponding path program 5 times [2022-12-13 16:15:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633187865] [2022-12-13 16:15:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 286 proven. 800 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 16:15:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633187865] [2022-12-13 16:15:26,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633187865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502914660] [2022-12-13 16:15:26,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:15:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:26,824 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:26,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 16:15:27,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 16:15:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:15:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 16:15:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:28,025 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:15:28,026 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 17 treesize of output 21 [2022-12-13 16:15:28,218 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 13 treesize of output 9 [2022-12-13 16:15:28,529 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-12-13 16:15:28,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-12-13 16:15:28,570 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 38 treesize of output 36 [2022-12-13 16:15:28,581 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 38 treesize of output 36 [2022-12-13 16:15:28,733 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 31 treesize of output 13 [2022-12-13 16:15:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 368 proven. 733 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 16:15:28,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:29,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2470 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_2470) c_~S~0.base) (+ c_~S~0.offset 4))) 1)) is different from false [2022-12-13 16:15:29,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:15:29,236 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 16:15:29,238 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 46 treesize of output 34 [2022-12-13 16:15:29,240 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 16 treesize of output 12 [2022-12-13 16:15:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 245 proven. 794 refuted. 70 times theorem prover too weak. 62 trivial. 2 not checked. [2022-12-13 16:15:30,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502914660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:30,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 40 [2022-12-13 16:15:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133594422] [2022-12-13 16:15:30,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:30,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 16:15:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 16:15:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1385, Unknown=5, NotChecked=76, Total=1640 [2022-12-13 16:15:30,064 INFO L87 Difference]: Start difference. First operand 36983 states and 41939 transitions. Second operand has 41 states, 40 states have (on average 9.575) internal successors, (383), 41 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:15,178 INFO L93 Difference]: Finished difference Result 85372 states and 96332 transitions. [2022-12-13 16:16:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-12-13 16:16:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 9.575) internal successors, (383), 41 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-12-13 16:16:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:15,239 INFO L225 Difference]: With dead ends: 85372 [2022-12-13 16:16:15,239 INFO L226 Difference]: Without dead ends: 85372 [2022-12-13 16:16:15,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 477 SyntacticMatches, 27 SemanticMatches, 195 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 15496 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=8248, Invalid=29971, Unknown=5, NotChecked=388, Total=38612 [2022-12-13 16:16:15,242 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 4097 mSDsluCounter, 8098 mSDsCounter, 0 mSdLazyCounter, 4058 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 8562 SdHoareTripleChecker+Invalid, 5736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 4058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1457 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:15,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4097 Valid, 8562 Invalid, 5736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 4058 Invalid, 0 Unknown, 1457 Unchecked, 2.7s Time] [2022-12-13 16:16:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85372 states. [2022-12-13 16:16:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85372 to 36089. [2022-12-13 16:16:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36080 states have (on average 1.1330376940133038) internal successors, (40880), 36088 states have internal predecessors, (40880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 40880 transitions. [2022-12-13 16:16:15,740 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 40880 transitions. Word has length 192 [2022-12-13 16:16:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:15,740 INFO L495 AbstractCegarLoop]: Abstraction has 36089 states and 40880 transitions. [2022-12-13 16:16:15,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 9.575) internal successors, (383), 41 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 40880 transitions. [2022-12-13 16:16:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-13 16:16:15,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:15,749 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:16:15,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 16:16:15,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:15,951 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:16:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1867130138, now seen corresponding path program 6 times [2022-12-13 16:16:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:15,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666342633] [2022-12-13 16:16:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:15,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 285 proven. 803 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 16:16:16,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666342633] [2022-12-13 16:16:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666342633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425844628] [2022-12-13 16:16:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:16:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:16,855 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:16,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 16:16:17,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 16:16:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 16:16:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:17,768 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:16:17,768 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 [2022-12-13 16:16:17,847 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 13 treesize of output 9 [2022-12-13 16:16:17,953 INFO L321 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2022-12-13 16:16:17,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2022-12-13 16:16:17,986 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 28 [2022-12-13 16:16:18,001 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 28 [2022-12-13 16:16:18,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:18,170 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 25 [2022-12-13 16:16:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 448 proven. 662 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 16:16:18,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:21,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:21,477 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 16:16:21,481 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 46 treesize of output 34 [2022-12-13 16:16:21,486 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 16 treesize of output 12 [2022-12-13 16:16:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 225 proven. 885 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 16:16:28,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425844628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:16:28,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:16:28,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-12-13 16:16:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718651720] [2022-12-13 16:16:28,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 16:16:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 16:16:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1592, Unknown=1, NotChecked=0, Total=1806 [2022-12-13 16:16:28,159 INFO L87 Difference]: Start difference. First operand 36089 states and 40880 transitions. Second operand has 43 states, 42 states have (on average 9.404761904761905) internal successors, (395), 43 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:47,833 INFO L93 Difference]: Finished difference Result 87321 states and 98638 transitions. [2022-12-13 16:16:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-13 16:16:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 9.404761904761905) internal successors, (395), 43 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-12-13 16:16:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:47,903 INFO L225 Difference]: With dead ends: 87321 [2022-12-13 16:16:47,903 INFO L226 Difference]: Without dead ends: 87321 [2022-12-13 16:16:47,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18432 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=11105, Invalid=41106, Unknown=1, NotChecked=0, Total=52212 [2022-12-13 16:16:47,908 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 3363 mSDsluCounter, 13339 mSDsCounter, 0 mSdLazyCounter, 6174 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 14070 SdHoareTripleChecker+Invalid, 6409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 6174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:47,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 14070 Invalid, 6409 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [235 Valid, 6174 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 16:16:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87321 states. [2022-12-13 16:16:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87321 to 42320. [2022-12-13 16:16:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42320 states, 42311 states have (on average 1.1350948925811255) internal successors, (48027), 42319 states have internal predecessors, (48027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42320 states to 42320 states and 48027 transitions. [2022-12-13 16:16:48,596 INFO L78 Accepts]: Start accepts. Automaton has 42320 states and 48027 transitions. Word has length 192 [2022-12-13 16:16:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:48,596 INFO L495 AbstractCegarLoop]: Abstraction has 42320 states and 48027 transitions. [2022-12-13 16:16:48,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 9.404761904761905) internal successors, (395), 43 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:16:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42320 states and 48027 transitions. [2022-12-13 16:16:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-13 16:16:48,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:48,610 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:16:48,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 16:16:48,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 16:16:48,812 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:16:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1867130139, now seen corresponding path program 2 times [2022-12-13 16:16:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:48,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542902961] [2022-12-13 16:16:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 127 proven. 961 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 16:16:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:50,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542902961] [2022-12-13 16:16:50,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542902961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:50,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811303597] [2022-12-13 16:16:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:16:50,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:50,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:50,231 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:50,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 16:16:50,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:16:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 16:16:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:50,439 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 [2022-12-13 16:16:50,444 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 [2022-12-13 16:16:50,750 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:16:50,750 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 [2022-12-13 16:16:50,769 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:16:50,770 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 17 treesize of output 21 [2022-12-13 16:16:51,027 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 13 treesize of output 9 [2022-12-13 16:16:51,036 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 13 treesize of output 9 [2022-12-13 16:16:51,472 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-12-13 16:16:51,472 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 20 treesize of output 22 [2022-12-13 16:16:51,479 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 16 treesize of output 18 [2022-12-13 16:16:51,522 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 14 treesize of output 16 [2022-12-13 16:16:51,527 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 32 treesize of output 30 [2022-12-13 16:16:51,539 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 14 treesize of output 16 [2022-12-13 16:16:51,543 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 32 treesize of output 30 [2022-12-13 16:16:51,690 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 25 treesize of output 13 [2022-12-13 16:16:51,693 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 15 treesize of output 7 [2022-12-13 16:16:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 119 proven. 971 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-13 16:16:51,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:52,260 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~t4~0.offset 4))) (and (forall ((v_ArrVal_2777 (Array Int Int)) (v_ArrVal_2776 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_2777) c_~t4~0.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_2776) c_~t4~0.base) .cse0)))) (forall ((v_ArrVal_2777 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_2777) c_~t4~0.base) .cse0) 4))))) is different from false [2022-12-13 16:16:54,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:54,306 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 16:16:54,309 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 40 treesize of output 28 [2022-12-13 16:16:54,312 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 13 treesize of output 9 [2022-12-13 16:16:54,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:54,321 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2022-12-13 16:16:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:16:54,325 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 46 treesize of output 34 [2022-12-13 16:16:54,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:16:54,330 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:16:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:16:54,333 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 27 treesize of output 15 [2022-12-13 16:17:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 119 proven. 967 refuted. 0 times theorem prover too weak. 83 trivial. 4 not checked. [2022-12-13 16:17:03,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811303597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:03,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:03,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-12-13 16:17:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122357898] [2022-12-13 16:17:03,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:03,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 16:17:03,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 16:17:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1515, Unknown=2, NotChecked=78, Total=1722 [2022-12-13 16:17:03,872 INFO L87 Difference]: Start difference. First operand 42320 states and 48027 transitions. Second operand has 42 states, 41 states have (on average 10.0) internal successors, (410), 42 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:17:28,965 INFO L93 Difference]: Finished difference Result 113027 states and 127678 transitions. [2022-12-13 16:17:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-12-13 16:17:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 10.0) internal successors, (410), 42 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-12-13 16:17:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:17:29,062 INFO L225 Difference]: With dead ends: 113027 [2022-12-13 16:17:29,062 INFO L226 Difference]: Without dead ends: 113027 [2022-12-13 16:17:29,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 528 SyntacticMatches, 12 SemanticMatches, 247 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24495 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=13389, Invalid=47869, Unknown=2, NotChecked=492, Total=61752 [2022-12-13 16:17:29,068 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 6070 mSDsluCounter, 8907 mSDsCounter, 0 mSdLazyCounter, 4689 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6070 SdHoareTripleChecker+Valid, 9412 SdHoareTripleChecker+Invalid, 6979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 4689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1963 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:17:29,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6070 Valid, 9412 Invalid, 6979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 4689 Invalid, 0 Unknown, 1963 Unchecked, 4.1s Time] [2022-12-13 16:17:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113027 states. [2022-12-13 16:17:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113027 to 40446. [2022-12-13 16:17:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40446 states, 40437 states have (on average 1.135321611395504) internal successors, (45909), 40445 states have internal predecessors, (45909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40446 states to 40446 states and 45909 transitions. [2022-12-13 16:17:29,711 INFO L78 Accepts]: Start accepts. Automaton has 40446 states and 45909 transitions. Word has length 192 [2022-12-13 16:17:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:17:29,711 INFO L495 AbstractCegarLoop]: Abstraction has 40446 states and 45909 transitions. [2022-12-13 16:17:29,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 10.0) internal successors, (410), 42 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 40446 states and 45909 transitions. [2022-12-13 16:17:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-12-13 16:17:29,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:17:29,723 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 12, 12, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:17:29,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 16:17:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 16:17:29,925 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:17:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:17:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1145905150, now seen corresponding path program 2 times [2022-12-13 16:17:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:17:29,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798269702] [2022-12-13 16:17:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:29,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:17:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 366 proven. 12 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-13 16:17:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:17:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798269702] [2022-12-13 16:17:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798269702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:17:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858384288] [2022-12-13 16:17:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:17:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:17:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:17:30,085 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:17:30,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 16:17:30,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:17:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:17:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:17:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:17:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 366 proven. 12 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-13 16:17:30,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:17:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 366 proven. 12 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-13 16:17:30,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858384288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:30,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:30,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-12-13 16:17:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918522257] [2022-12-13 16:17:30,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:17:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:17:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:17:30,470 INFO L87 Difference]: Start difference. First operand 40446 states and 45909 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:17:30,655 INFO L93 Difference]: Finished difference Result 50875 states and 57650 transitions. [2022-12-13 16:17:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:17:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2022-12-13 16:17:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:17:30,696 INFO L225 Difference]: With dead ends: 50875 [2022-12-13 16:17:30,696 INFO L226 Difference]: Without dead ends: 50875 [2022-12-13 16:17:30,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:17:30,697 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 240 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:17:30,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 472 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:17:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2022-12-13 16:17:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 40446. [2022-12-13 16:17:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40446 states, 40437 states have (on average 1.1352968815688602) internal successors, (45908), 40445 states have internal predecessors, (45908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40446 states to 40446 states and 45908 transitions. [2022-12-13 16:17:31,056 INFO L78 Accepts]: Start accepts. Automaton has 40446 states and 45908 transitions. Word has length 216 [2022-12-13 16:17:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:17:31,056 INFO L495 AbstractCegarLoop]: Abstraction has 40446 states and 45908 transitions. [2022-12-13 16:17:31,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 40446 states and 45908 transitions. [2022-12-13 16:17:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-13 16:17:31,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:17:31,068 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 12, 12, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:17:31,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 16:17:31,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 16:17:31,270 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:17:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:17:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1163368144, now seen corresponding path program 1 times [2022-12-13 16:17:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:17:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281710641] [2022-12-13 16:17:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:17:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 291 proven. 954 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-13 16:17:31,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:17:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281710641] [2022-12-13 16:17:31,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281710641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:17:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433773441] [2022-12-13 16:17:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:31,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:17:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:17:31,791 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:17:31,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 16:17:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 16:17:31,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:17:32,072 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 13 treesize of output 9 [2022-12-13 16:17:32,195 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 [2022-12-13 16:17:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 283 proven. 948 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 16:17:32,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:17:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 98 proven. 1090 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-13 16:17:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433773441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:32,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:32,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 19 [2022-12-13 16:17:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191780296] [2022-12-13 16:17:32,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:17:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:17:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:17:32,535 INFO L87 Difference]: Start difference. First operand 40446 states and 45908 transitions. Second operand has 20 states, 19 states have (on average 11.736842105263158) internal successors, (223), 20 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:17:34,604 INFO L93 Difference]: Finished difference Result 103091 states and 117411 transitions. [2022-12-13 16:17:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 16:17:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 11.736842105263158) internal successors, (223), 20 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-12-13 16:17:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:17:34,692 INFO L225 Difference]: With dead ends: 103091 [2022-12-13 16:17:34,693 INFO L226 Difference]: Without dead ends: 103091 [2022-12-13 16:17:34,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2376, Invalid=9396, Unknown=0, NotChecked=0, Total=11772 [2022-12-13 16:17:34,694 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3340 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3340 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:17:34,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3340 Valid, 1892 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 16:17:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103091 states. [2022-12-13 16:17:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103091 to 61637. [2022-12-13 16:17:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61637 states, 61628 states have (on average 1.1409262023755435) internal successors, (70313), 61636 states have internal predecessors, (70313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61637 states to 61637 states and 70313 transitions. [2022-12-13 16:17:35,380 INFO L78 Accepts]: Start accepts. Automaton has 61637 states and 70313 transitions. Word has length 217 [2022-12-13 16:17:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:17:35,380 INFO L495 AbstractCegarLoop]: Abstraction has 61637 states and 70313 transitions. [2022-12-13 16:17:35,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 11.736842105263158) internal successors, (223), 20 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 61637 states and 70313 transitions. [2022-12-13 16:17:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-13 16:17:35,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:17:35,393 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 12, 12, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:17:35,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 16:17:35,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 16:17:35,594 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:17:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:17:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1704674274, now seen corresponding path program 2 times [2022-12-13 16:17:35,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:17:35,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670214050] [2022-12-13 16:17:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:17:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 125 proven. 1106 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 16:17:36,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:17:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670214050] [2022-12-13 16:17:36,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670214050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:17:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265764634] [2022-12-13 16:17:36,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:17:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:17:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:17:36,175 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:17:36,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 16:17:36,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:17:36,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:17:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 16:17:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:17:36,461 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 13 treesize of output 9 [2022-12-13 16:17:36,575 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 17 treesize of output 9 [2022-12-13 16:17:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 125 proven. 1106 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 16:17:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:17:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 98 proven. 1090 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-13 16:17:36,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265764634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:36,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:36,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 17 [2022-12-13 16:17:36,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717070977] [2022-12-13 16:17:36,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:36,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:17:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:17:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:17:36,908 INFO L87 Difference]: Start difference. First operand 61637 states and 70313 transitions. Second operand has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:17:40,173 INFO L93 Difference]: Finished difference Result 167181 states and 190139 transitions. [2022-12-13 16:17:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-13 16:17:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-12-13 16:17:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:17:40,314 INFO L225 Difference]: With dead ends: 167181 [2022-12-13 16:17:40,314 INFO L226 Difference]: Without dead ends: 167181 [2022-12-13 16:17:40,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 489 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2929, Invalid=9953, Unknown=0, NotChecked=0, Total=12882 [2022-12-13 16:17:40,315 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 3240 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3240 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:17:40,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3240 Valid, 1758 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 16:17:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167181 states. [2022-12-13 16:17:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167181 to 88694. [2022-12-13 16:17:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88694 states, 88685 states have (on average 1.1433049557422337) internal successors, (101394), 88693 states have internal predecessors, (101394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88694 states to 88694 states and 101394 transitions. [2022-12-13 16:17:41,553 INFO L78 Accepts]: Start accepts. Automaton has 88694 states and 101394 transitions. Word has length 218 [2022-12-13 16:17:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:17:41,554 INFO L495 AbstractCegarLoop]: Abstraction has 88694 states and 101394 transitions. [2022-12-13 16:17:41,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 88694 states and 101394 transitions. [2022-12-13 16:17:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-13 16:17:41,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:17:41,570 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 12, 12, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:17:41,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 16:17:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 16:17:41,771 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:17:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:17:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 258167253, now seen corresponding path program 3 times [2022-12-13 16:17:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:17:41,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490111273] [2022-12-13 16:17:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:17:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 256 proven. 999 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-13 16:17:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:17:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490111273] [2022-12-13 16:17:43,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490111273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:17:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114210271] [2022-12-13 16:17:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:17:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:17:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:17:43,270 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:17:43,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 16:17:43,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 16:17:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:17:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 16:17:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:17:43,866 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 [2022-12-13 16:17:43,935 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:17:43,935 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 17 treesize of output 21 [2022-12-13 16:17:44,095 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 13 treesize of output 9 [2022-12-13 16:17:44,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:17:44,403 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 31 treesize of output 25 [2022-12-13 16:17:45,116 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 13 treesize of output 9 [2022-12-13 16:17:45,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:17:45,255 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 31 treesize of output 21 [2022-12-13 16:17:45,408 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-13 16:17:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 400 proven. 828 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 16:17:45,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:17:45,536 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 13 treesize of output 11 [2022-12-13 16:17:45,539 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 20 treesize of output 18 [2022-12-13 16:17:45,544 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 14 treesize of output 12 [2022-12-13 16:17:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:17:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 107 proven. 1121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 16:17:46,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114210271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:46,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:46,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-12-13 16:17:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164440306] [2022-12-13 16:17:46,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:46,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 16:17:46,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 16:17:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2443, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 16:17:46,361 INFO L87 Difference]: Start difference. First operand 88694 states and 101394 transitions. Second operand has 52 states, 51 states have (on average 8.156862745098039) internal successors, (416), 52 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:19:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:19:28,160 INFO L93 Difference]: Finished difference Result 394607 states and 449217 transitions. [2022-12-13 16:19:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1006 states. [2022-12-13 16:19:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 8.156862745098039) internal successors, (416), 52 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-12-13 16:19:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:19:28,566 INFO L225 Difference]: With dead ends: 394607 [2022-12-13 16:19:28,566 INFO L226 Difference]: Without dead ends: 394607 [2022-12-13 16:19:28,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2119 GetRequests, 1068 SyntacticMatches, 1 SemanticMatches, 1050 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504762 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=70481, Invalid=1035171, Unknown=0, NotChecked=0, Total=1105652 [2022-12-13 16:19:28,611 INFO L413 NwaCegarLoop]: 3519 mSDtfsCounter, 5948 mSDsluCounter, 82603 mSDsCounter, 0 mSdLazyCounter, 41162 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5948 SdHoareTripleChecker+Valid, 86122 SdHoareTripleChecker+Invalid, 41590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 41162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:19:28,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5948 Valid, 86122 Invalid, 41590 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [428 Valid, 41162 Invalid, 0 Unknown, 0 Unchecked, 25.8s Time] [2022-12-13 16:19:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394607 states. [2022-12-13 16:19:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394607 to 144048. [2022-12-13 16:19:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144048 states, 144039 states have (on average 1.1472656711029652) internal successors, (165251), 144047 states have internal predecessors, (165251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:19:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144048 states to 144048 states and 165251 transitions. [2022-12-13 16:19:31,247 INFO L78 Accepts]: Start accepts. Automaton has 144048 states and 165251 transitions. Word has length 221 [2022-12-13 16:19:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:19:31,247 INFO L495 AbstractCegarLoop]: Abstraction has 144048 states and 165251 transitions. [2022-12-13 16:19:31,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 8.156862745098039) internal successors, (416), 52 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:19:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 144048 states and 165251 transitions. [2022-12-13 16:19:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-13 16:19:31,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:19:31,267 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 12, 12, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:19:31,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 16:19:31,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:19:31,468 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:19:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:19:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash 258167254, now seen corresponding path program 1 times [2022-12-13 16:19:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:19:31,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095157349] [2022-12-13 16:19:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:19:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:19:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:19:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 10 proven. 1284 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 16:19:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:19:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095157349] [2022-12-13 16:19:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095157349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:19:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716557529] [2022-12-13 16:19:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:19:33,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:19:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:19:33,795 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:19:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 16:19:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:19:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 16:19:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:19:34,312 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 13 treesize of output 9 [2022-12-13 16:19:34,315 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 13 treesize of output 9 [2022-12-13 16:19:34,386 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 21 treesize of output 9 [2022-12-13 16:19:34,388 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 7 [2022-12-13 16:19:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 602 proven. 493 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-12-13 16:19:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:19:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 521 proven. 115 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-12-13 16:19:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716557529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:19:34,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:19:34,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 9] total 42 [2022-12-13 16:19:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249869422] [2022-12-13 16:19:34,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:19:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 16:19:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:19:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 16:19:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 16:19:34,948 INFO L87 Difference]: Start difference. First operand 144048 states and 165251 transitions. Second operand has 43 states, 42 states have (on average 8.357142857142858) internal successors, (351), 43 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:20:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:20:02,156 INFO L93 Difference]: Finished difference Result 365102 states and 415838 transitions. [2022-12-13 16:20:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 376 states. [2022-12-13 16:20:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 8.357142857142858) internal successors, (351), 43 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-12-13 16:20:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:20:02,497 INFO L225 Difference]: With dead ends: 365102 [2022-12-13 16:20:02,497 INFO L226 Difference]: Without dead ends: 365102 [2022-12-13 16:20:02,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71357 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=10874, Invalid=160936, Unknown=0, NotChecked=0, Total=171810 [2022-12-13 16:20:02,506 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 6571 mSDsluCounter, 23569 mSDsCounter, 0 mSdLazyCounter, 12730 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6571 SdHoareTripleChecker+Valid, 24446 SdHoareTripleChecker+Invalid, 13157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 12730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:20:02,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6571 Valid, 24446 Invalid, 13157 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [427 Valid, 12730 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-13 16:20:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365102 states. [2022-12-13 16:20:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365102 to 157662. [2022-12-13 16:20:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157662 states, 157653 states have (on average 1.1499115145287435) internal successors, (181287), 157661 states have internal predecessors, (181287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:20:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157662 states to 157662 states and 181287 transitions. [2022-12-13 16:20:05,239 INFO L78 Accepts]: Start accepts. Automaton has 157662 states and 181287 transitions. Word has length 221 [2022-12-13 16:20:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:20:05,240 INFO L495 AbstractCegarLoop]: Abstraction has 157662 states and 181287 transitions. [2022-12-13 16:20:05,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 8.357142857142858) internal successors, (351), 43 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:20:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 157662 states and 181287 transitions. [2022-12-13 16:20:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-13 16:20:05,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:20:05,259 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 13, 12, 11, 11, 10, 9, 7, 7, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:20:05,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-13 16:20:05,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:20:05,460 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 16:20:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:20:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 703265253, now seen corresponding path program 7 times [2022-12-13 16:20:05,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:20:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878480111] [2022-12-13 16:20:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:20:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:20:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:20:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 132 proven. 1352 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 16:20:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:20:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878480111] [2022-12-13 16:20:07,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878480111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:20:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772936743] [2022-12-13 16:20:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:20:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:20:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:20:07,867 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:20:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012941ec-9837-49f0-bfd7-98250d24ca06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 16:20:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:20:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-13 16:20:08,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:20:08,081 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 [2022-12-13 16:20:08,251 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 13 treesize of output 9 [2022-12-13 16:20:08,256 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 13 treesize of output 9 [2022-12-13 16:20:08,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:20:08,487 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 11 treesize of output 11 [2022-12-13 16:20:08,530 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 14 treesize of output 16 [2022-12-13 16:20:08,537 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 14 treesize of output 16 [2022-12-13 16:20:08,546 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 14 treesize of output 16 [2022-12-13 16:20:08,555 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 14 treesize of output 16 [2022-12-13 16:20:08,614 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 14 treesize of output 16 [2022-12-13 16:20:08,622 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 14 treesize of output 16 [2022-12-13 16:20:08,767 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 21 treesize of output 20 [2022-12-13 16:20:08,773 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 27 treesize of output 26 [2022-12-13 16:20:09,995 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-13 16:20:09,995 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 51 [2022-12-13 16:20:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:20:10,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-13 16:20:10,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:20:10,007 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 16:20:10,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:20:10,012 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-12-13 16:20:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:20:10,137 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-12-13 16:20:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:20:10,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:20:10,141 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 17 treesize of output 10 [2022-12-13 16:20:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 176 proven. 1304 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 16:20:10,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:20:14,980 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 56 treesize of output 52 [2022-12-13 16:20:14,984 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 108 treesize of output 96 [2022-12-13 16:20:15,262 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 56 treesize of output 52 [2022-12-13 16:20:15,266 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 108 treesize of output 96 [2022-12-13 16:20:17,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:20:17,379 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:20:17,382 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 36 treesize of output 24 [2022-12-13 16:20:17,385 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 7 [2022-12-13 16:20:17,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:20:17,397 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 16:20:17,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:20:17,400 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 20 treesize of output 8 [2022-12-13 16:20:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 138 proven. 1349 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 16:20:18,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772936743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:20:18,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:20:18,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 22] total 57 [2022-12-13 16:20:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975025738] [2022-12-13 16:20:18,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:20:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 16:20:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:20:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 16:20:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3108, Unknown=2, NotChecked=0, Total=3306 [2022-12-13 16:20:18,022 INFO L87 Difference]: Start difference. First operand 157662 states and 181287 transitions. Second operand has 58 states, 58 states have (on average 8.586206896551724) internal successors, (498), 57 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:20:49,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]