./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN --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 64bit --witnessprinter.graph.data.programhash 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- 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-6b4ec56 [2022-11-20 09:27:07,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:07,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:07,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:07,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:07,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:07,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:07,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:07,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:07,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:07,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:07,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:07,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:07,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:07,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:07,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:07,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:07,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:07,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:07,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:07,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:07,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:07,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:07,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:07,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:07,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:07,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:07,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:07,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:07,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:07,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:07,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:07,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:07,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:07,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:07,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:07,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:07,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:07,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:07,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:07,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:07,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-20 09:27:07,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:07,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:07,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:07,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:07,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:07,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:07,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:07,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:07,870 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:07,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:07,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:07,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:07,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:07,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:27:07,873 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:27:07,873 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:27:07,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:07,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:27:07,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:07,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:07,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:07,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:07,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:07,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:07,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:07,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:07,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:07,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2022-11-20 09:27:08,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:08,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:08,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:08,193 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:08,194 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:08,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-11-20 09:27:11,289 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:11,463 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:11,464 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-11-20 09:27:11,472 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/data/d61b8fd24/562527a51cc94b64970706334945cebb/FLAGd7752c61a [2022-11-20 09:27:11,492 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/data/d61b8fd24/562527a51cc94b64970706334945cebb [2022-11-20 09:27:11,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:11,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:11,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:11,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:11,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:11,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a17792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11, skipping insertion in model container [2022-11-20 09:27:11,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:11,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:11,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:11,698 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:11,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:11,730 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:11,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11 WrapperNode [2022-11-20 09:27:11,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:11,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:11,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:11,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:11,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,767 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-11-20 09:27:11,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:11,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:11,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:11,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:11,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:11,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:11,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:11,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:11,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:11,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:27:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:27:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:27:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:11,970 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:11,972 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:12,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:12,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:12,237 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:27:12,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:12 BoogieIcfgContainer [2022-11-20 09:27:12,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:12,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:12,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:12,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:12,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:11" (1/3) ... [2022-11-20 09:27:12,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d562d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:12, skipping insertion in model container [2022-11-20 09:27:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11" (2/3) ... [2022-11-20 09:27:12,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d562d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:12, skipping insertion in model container [2022-11-20 09:27:12,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:12" (3/3) ... [2022-11-20 09:27:12,252 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2022-11-20 09:27:12,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:12,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-20 09:27:12,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:12,369 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36050c78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:12,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-20 09:27:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-11-20 09:27:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 09:27:12,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:12,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 09:27:12,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-11-20 09:27:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431105300] [2022-11-20 09:27:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431105300] [2022-11-20 09:27:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431105300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:12,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135402017] [2022-11-20 09:27:12,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:12,748 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-20 09:27:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:12,850 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-20 09:27:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-20 09:27:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:12,866 INFO L225 Difference]: With dead ends: 30 [2022-11-20 09:27:12,866 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 09:27:12,868 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 [2022-11-20 09:27:12,886 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:12,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 09:27:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 09:27:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-11-20 09:27:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-20 09:27:12,915 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-11-20 09:27:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:12,916 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-20 09:27:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-20 09:27:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-20 09:27:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 09:27:12,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:12,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 09:27:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:12,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-11-20 09:27:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504955494] [2022-11-20 09:27:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:13,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504955494] [2022-11-20 09:27:13,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504955494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:13,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:13,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453884850] [2022-11-20 09:27:13,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:13,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:13,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:13,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:13,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:13,063 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-20 09:27:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:13,111 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-20 09:27:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-20 09:27:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:13,113 INFO L225 Difference]: With dead ends: 32 [2022-11-20 09:27:13,113 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 09:27:13,114 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 [2022-11-20 09:27:13,115 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:13,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 09:27:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-11-20 09:27:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 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) [2022-11-20 09:27:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-20 09:27:13,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-11-20 09:27:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-20 09:27:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-20 09:27:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-20 09:27:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:27:13,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:13,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:27:13,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-11-20 09:27:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:13,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93015083] [2022-11-20 09:27:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:13,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:13,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93015083] [2022-11-20 09:27:13,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93015083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:13,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463493491] [2022-11-20 09:27:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:13,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:13,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:27:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:13,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:27:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:13,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:13,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463493491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:13,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:13,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-20 09:27:13,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900167019] [2022-11-20 09:27:13,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:13,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:27:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:27:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:27:13,875 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-20 09:27:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:14,115 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-11-20 09:27:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:14,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 [2022-11-20 09:27:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:14,119 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:27:14,119 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 09:27:14,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:27:14,125 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:14,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 09:27:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-20 09:27:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 38 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) [2022-11-20 09:27:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-20 09:27:14,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2022-11-20 09:27:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:14,144 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-20 09:27:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-20 09:27:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-20 09:27:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:27:14,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:14,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 09:27:14,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 09:27:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:14,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 519338591, now seen corresponding path program 1 times [2022-11-20 09:27:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:14,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029299678] [2022-11-20 09:27:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:27:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029299678] [2022-11-20 09:27:14,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029299678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:14,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:14,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:14,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275143311] [2022-11-20 09:27:14,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:14,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:14,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:14,516 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-20 09:27:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:14,566 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-11-20 09:27:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:14,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 21 [2022-11-20 09:27:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:14,568 INFO L225 Difference]: With dead ends: 36 [2022-11-20 09:27:14,569 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 09:27:14,570 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 [2022-11-20 09:27:14,581 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:14,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 15 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 09:27:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 09:27:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-11-20 09:27:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-20 09:27:14,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2022-11-20 09:27:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:14,588 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-20 09:27:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-20 09:27:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-20 09:27:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:27:14,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:14,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 09:27:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:27:14,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 1 times [2022-11-20 09:27:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:14,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908359759] [2022-11-20 09:27:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:14,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908359759] [2022-11-20 09:27:14,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908359759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980769819] [2022-11-20 09:27:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:14,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:14,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:27:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:14,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980769819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:14,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:14,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-20 09:27:14,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797570192] [2022-11-20 09:27:14,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:14,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:27:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:27:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:27:14,988 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2022-11-20 09:27:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:15,049 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-20 09:27:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:27:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 21 [2022-11-20 09:27:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:15,051 INFO L225 Difference]: With dead ends: 60 [2022-11-20 09:27:15,051 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 09:27:15,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:27:15,052 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:15,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 09:27:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-20 09:27:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 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) [2022-11-20 09:27:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-20 09:27:15,059 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 21 [2022-11-20 09:27:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:15,060 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-20 09:27:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2022-11-20 09:27:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-20 09:27:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:27:15,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:15,061 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-20 09:27:15,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:27:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:15,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash 649821198, now seen corresponding path program 2 times [2022-11-20 09:27:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786163364] [2022-11-20 09:27:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786163364] [2022-11-20 09:27:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786163364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378383943] [2022-11-20 09:27:15,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:15,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:15,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:15,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:27:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:27:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:15,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:27:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 09:27:15,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:15,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378383943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:15,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:15,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-20 09:27:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988690175] [2022-11-20 09:27:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:27:15,995 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2022-11-20 09:27:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:16,079 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-11-20 09:27:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 45 [2022-11-20 09:27:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:16,084 INFO L225 Difference]: With dead ends: 73 [2022-11-20 09:27:16,084 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 09:27:16,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:27:16,086 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:16,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 09:27:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-11-20 09:27:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 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) [2022-11-20 09:27:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-20 09:27:16,098 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2022-11-20 09:27:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:16,100 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-20 09:27:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-20 09:27:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-20 09:27:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 09:27:16,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:16,105 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:16,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 09:27:16,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 09:27:16,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678828, now seen corresponding path program 1 times [2022-11-20 09:27:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122947584] [2022-11-20 09:27:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:16,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122947584] [2022-11-20 09:27:16,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122947584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531001610] [2022-11-20 09:27:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:16,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:16,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:27:16,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:16,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:17,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531001610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:17,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:17,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 09:27:17,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90748665] [2022-11-20 09:27:17,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:17,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:27:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:27:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:27:17,019 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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) [2022-11-20 09:27:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:17,137 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-11-20 09:27:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:27:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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 48 [2022-11-20 09:27:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:17,139 INFO L225 Difference]: With dead ends: 115 [2022-11-20 09:27:17,139 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 09:27:17,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:27:17,140 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:17,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 82 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 09:27:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-20 09:27:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 114 states have internal predecessors, (119), 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) [2022-11-20 09:27:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-11-20 09:27:17,147 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 48 [2022-11-20 09:27:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:17,148 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-11-20 09:27:17,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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) [2022-11-20 09:27:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-11-20 09:27:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 09:27:17,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:17,150 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:17,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:17,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1050107376, now seen corresponding path program 2 times [2022-11-20 09:27:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286838394] [2022-11-20 09:27:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:18,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:18,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286838394] [2022-11-20 09:27:18,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286838394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:18,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255927561] [2022-11-20 09:27:18,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:18,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:18,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:18,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:18,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:27:18,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:27:18,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:27:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:18,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:19,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255927561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:19,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:19,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-20 09:27:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500726430] [2022-11-20 09:27:19,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 09:27:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 09:27:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 09:27:19,540 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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) [2022-11-20 09:27:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:19,812 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-11-20 09:27:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 09:27:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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 [2022-11-20 09:27:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:19,815 INFO L225 Difference]: With dead ends: 211 [2022-11-20 09:27:19,815 INFO L226 Difference]: Without dead ends: 211 [2022-11-20 09:27:19,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 09:27:19,818 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 207 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:19,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 124 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-20 09:27:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-20 09:27:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 210 states have internal predecessors, (215), 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) [2022-11-20 09:27:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-11-20 09:27:19,847 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 96 [2022-11-20 09:27:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:19,849 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-11-20 09:27:19,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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) [2022-11-20 09:27:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-11-20 09:27:19,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 09:27:19,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:19,854 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:19,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:20,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -17107880, now seen corresponding path program 3 times [2022-11-20 09:27:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:20,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362899667] [2022-11-20 09:27:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362899667] [2022-11-20 09:27:22,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362899667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449450790] [2022-11-20 09:27:22,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:27:22,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:22,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:22,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:27:23,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:27:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:27:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:23,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:27:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-11-20 09:27:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-11-20 09:27:24,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449450790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:24,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:24,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2022-11-20 09:27:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627530967] [2022-11-20 09:27:24,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 09:27:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:24,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 09:27:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 09:27:24,927 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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) [2022-11-20 09:27:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:27,184 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2022-11-20 09:27:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 09:27:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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 [2022-11-20 09:27:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:27,186 INFO L225 Difference]: With dead ends: 250 [2022-11-20 09:27:27,186 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 09:27:27,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 09:27:27,191 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 349 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:27,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 119 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:27:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 09:27:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2022-11-20 09:27:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 225 states have (on average 1.048888888888889) internal successors, (236), 227 states have internal predecessors, (236), 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) [2022-11-20 09:27:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2022-11-20 09:27:27,199 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 192 [2022-11-20 09:27:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:27,200 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2022-11-20 09:27:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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) [2022-11-20 09:27:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2022-11-20 09:27:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-20 09:27:27,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:27,203 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:27,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:27,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 602519778, now seen corresponding path program 1 times [2022-11-20 09:27:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523007025] [2022-11-20 09:27:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2022-11-20 09:27:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523007025] [2022-11-20 09:27:27,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523007025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:27,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:27,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924912496] [2022-11-20 09:27:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:27,584 INFO L87 Difference]: Start difference. First operand 228 states and 236 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-11-20 09:27:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:27,594 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2022-11-20 09:27:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 196 [2022-11-20 09:27:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:27,597 INFO L225 Difference]: With dead ends: 227 [2022-11-20 09:27:27,597 INFO L226 Difference]: Without dead ends: 227 [2022-11-20 09:27:27,598 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 [2022-11-20 09:27:27,598 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:27,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-20 09:27:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-20 09:27:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0444444444444445) internal successors, (235), 226 states have internal predecessors, (235), 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) [2022-11-20 09:27:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-11-20 09:27:27,606 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 196 [2022-11-20 09:27:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-11-20 09:27:27,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-11-20 09:27:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-11-20 09:27:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-20 09:27:27,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:27,610 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:27,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:27:27,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash -799075579, now seen corresponding path program 1 times [2022-11-20 09:27:27,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339453025] [2022-11-20 09:27:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:30,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339453025] [2022-11-20 09:27:30,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339453025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994926414] [2022-11-20 09:27:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:30,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:30,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:30,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:27:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 09:27:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:30,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:34,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994926414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:34,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:34,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-11-20 09:27:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098343949] [2022-11-20 09:27:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:34,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-20 09:27:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:34,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-20 09:27:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 09:27:34,065 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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) [2022-11-20 09:27:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:34,703 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2022-11-20 09:27:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 09:27:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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 198 [2022-11-20 09:27:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:34,706 INFO L225 Difference]: With dead ends: 423 [2022-11-20 09:27:34,707 INFO L226 Difference]: Without dead ends: 423 [2022-11-20 09:27:34,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 09:27:34,710 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:34,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 211 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:27:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-20 09:27:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-11-20 09:27:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0237529691211402) internal successors, (431), 422 states have internal predecessors, (431), 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) [2022-11-20 09:27:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2022-11-20 09:27:34,720 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2022-11-20 09:27:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:34,720 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2022-11-20 09:27:34,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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) [2022-11-20 09:27:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2022-11-20 09:27:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-20 09:27:34,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:34,729 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:34,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 09:27:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:27:34,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1623122088, now seen corresponding path program 2 times [2022-11-20 09:27:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753192538] [2022-11-20 09:27:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753192538] [2022-11-20 09:27:44,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753192538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355934744] [2022-11-20 09:27:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:44,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:44,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:44,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:27:44,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:27:44,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:44,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:46,668 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2022-11-20 09:27:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2022-11-20 09:27:46,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355934744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:46,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:46,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2022-11-20 09:27:46,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063678563] [2022-11-20 09:27:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:46,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:46,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5048, Unknown=1, NotChecked=196, Total=10100 [2022-11-20 09:27:46,693 INFO L87 Difference]: Start difference. First operand 423 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-20 09:27:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:46,699 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2022-11-20 09:27:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 394 [2022-11-20 09:27:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:46,702 INFO L225 Difference]: With dead ends: 429 [2022-11-20 09:27:46,702 INFO L226 Difference]: Without dead ends: 425 [2022-11-20 09:27:46,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4855, Invalid=5048, Unknown=1, NotChecked=196, Total=10100 [2022-11-20 09:27:46,707 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:46,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-11-20 09:27:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-20 09:27:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-11-20 09:27:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.0236406619385343) internal successors, (433), 424 states have internal predecessors, (433), 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) [2022-11-20 09:27:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2022-11-20 09:27:46,719 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 394 [2022-11-20 09:27:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:46,720 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2022-11-20 09:27:46,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-20 09:27:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2022-11-20 09:27:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-11-20 09:27:46,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:46,729 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:46,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 09:27:46,936 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:27:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash -342671882, now seen corresponding path program 1 times [2022-11-20 09:27:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179029647] [2022-11-20 09:27:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:54,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179029647] [2022-11-20 09:27:54,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179029647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903062074] [2022-11-20 09:27:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:54,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:54,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:27:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:56,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903062074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:08,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:08,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2022-11-20 09:28:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880604122] [2022-11-20 09:28:08,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-11-20 09:28:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:08,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-11-20 09:28:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-11-20 09:28:08,629 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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) [2022-11-20 09:28:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:10,989 INFO L93 Difference]: Finished difference Result 817 states and 825 transitions. [2022-11-20 09:28:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-20 09:28:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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 397 [2022-11-20 09:28:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:10,994 INFO L225 Difference]: With dead ends: 817 [2022-11-20 09:28:10,995 INFO L226 Difference]: Without dead ends: 817 [2022-11-20 09:28:10,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-11-20 09:28:10,999 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 873 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:11,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 324 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:28:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-20 09:28:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-11-20 09:28:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 815 states have (on average 1.0122699386503067) internal successors, (825), 816 states have internal predecessors, (825), 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) [2022-11-20 09:28:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 825 transitions. [2022-11-20 09:28:11,017 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 825 transitions. Word has length 397 [2022-11-20 09:28:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:11,018 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 825 transitions. [2022-11-20 09:28:11,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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) [2022-11-20 09:28:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 825 transitions. [2022-11-20 09:28:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-11-20 09:28:11,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:11,046 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:11,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:28:11,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:28:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2100549616, now seen corresponding path program 2 times [2022-11-20 09:28:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369912093] [2022-11-20 09:28:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369912093] [2022-11-20 09:28:44,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369912093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830557443] [2022-11-20 09:28:44,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:44,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:44,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:28:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:48,714 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2022-11-20 09:28:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75080 trivial. 0 not checked. [2022-11-20 09:28:48,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830557443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:48,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:28:48,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [197] total 199 [2022-11-20 09:28:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199794032] [2022-11-20 09:28:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19310, Invalid=19699, Unknown=1, NotChecked=392, Total=39402 [2022-11-20 09:28:48,733 INFO L87 Difference]: Start difference. First operand 817 states and 825 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-20 09:28:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:48,737 INFO L93 Difference]: Finished difference Result 837 states and 851 transitions. [2022-11-20 09:28:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 789 [2022-11-20 09:28:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:48,741 INFO L225 Difference]: With dead ends: 837 [2022-11-20 09:28:48,741 INFO L226 Difference]: Without dead ends: 833 [2022-11-20 09:28:48,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=19310, Invalid=19699, Unknown=1, NotChecked=392, Total=39402 [2022-11-20 09:28:48,746 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:48,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-11-20 09:28:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-20 09:28:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 828. [2022-11-20 09:28:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.0181598062953996) internal successors, (841), 827 states have internal predecessors, (841), 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) [2022-11-20 09:28:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 841 transitions. [2022-11-20 09:28:48,763 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 841 transitions. Word has length 789 [2022-11-20 09:28:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:48,764 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 841 transitions. [2022-11-20 09:28:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-20 09:28:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 841 transitions. [2022-11-20 09:28:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2022-11-20 09:28:48,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:48,770 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 09:28:48,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:48,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:28:48,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-20 09:28:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 708285286, now seen corresponding path program 4 times [2022-11-20 09:28:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719315809] [2022-11-20 09:28:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:48,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:29:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:20,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719315809] [2022-11-20 09:29:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719315809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:20,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220914304] [2022-11-20 09:29:20,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:29:20,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:20,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:20,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec11d070-5e3f-4f0e-b5ed-9cba2064244e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process