./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 --- 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-dbf71c6-m [2022-10-17 10:30:52,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:30:52,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:30:52,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:30:52,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:30:52,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:30:52,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:30:52,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:30:52,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:30:52,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:30:52,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:30:52,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:30:52,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:30:52,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:30:52,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:30:52,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:30:52,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:30:52,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:30:52,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:30:52,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:30:52,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:30:52,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:30:52,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:30:52,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:30:52,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:30:52,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:30:52,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:30:52,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:30:52,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:30:52,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:30:52,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:30:52,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:30:52,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:30:52,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:30:52,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:30:52,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:30:52,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:30:52,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:30:52,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:30:52,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:30:52,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:30:52,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 10:30:52,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:30:52,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:30:52,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:30:52,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:30:52,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:30:52,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:30:52,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:30:52,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:30:52,696 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:30:52,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:30:52,697 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:30:52,697 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:30:52,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:30:52,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:30:52,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:30:52,698 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:30:52,698 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:30:52,699 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 10:30:52,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:30:52,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:30:52,700 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:30:52,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:30:52,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:30:52,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:30:52,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:30:52,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:30:52,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:30:52,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:30:52,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:30:52,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:30:52,702 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_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 [2022-10-17 10:30:53,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:30:53,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:30:53,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:30:53,078 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:30:53,079 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:30:53,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/memsafety/test-0232-2.i [2022-10-17 10:30:53,165 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/data/3ac5131a9/04656e63090d46cd87a333d090d14cae/FLAG04dbc8543 [2022-10-17 10:30:53,782 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:30:53,783 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/sv-benchmarks/c/memsafety/test-0232-2.i [2022-10-17 10:30:53,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/data/3ac5131a9/04656e63090d46cd87a333d090d14cae/FLAG04dbc8543 [2022-10-17 10:30:54,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/data/3ac5131a9/04656e63090d46cd87a333d090d14cae [2022-10-17 10:30:54,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:30:54,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:30:54,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:30:54,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:30:54,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:30:54,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6feed36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54, skipping insertion in model container [2022-10-17 10:30:54,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:30:54,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:30:54,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:30:54,602 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:30:54,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:30:54,728 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:30:54,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54 WrapperNode [2022-10-17 10:30:54,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:30:54,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:30:54,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:30:54,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:30:54,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,826 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-10-17 10:30:54,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:30:54,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:30:54,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:30:54,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:30:54,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:30:54,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:30:54,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:30:54,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:30:54,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (1/1) ... [2022-10-17 10:30:54,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:30:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:30:54,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:30:54,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:30:55,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:30:55,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:30:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:30:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:30:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:30:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:30:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 10:30:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:30:55,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:30:55,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:30:55,147 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:30:55,150 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:30:55,673 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:30:55,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:30:55,682 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:30:55,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:30:55 BoogieIcfgContainer [2022-10-17 10:30:55,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:30:55,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:30:55,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:30:55,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:30:55,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:30:54" (1/3) ... [2022-10-17 10:30:55,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155608d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:30:55, skipping insertion in model container [2022-10-17 10:30:55,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:30:54" (2/3) ... [2022-10-17 10:30:55,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155608d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:30:55, skipping insertion in model container [2022-10-17 10:30:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:30:55" (3/3) ... [2022-10-17 10:30:55,698 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-2.i [2022-10-17 10:30:55,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:30:55,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-10-17 10:30:55,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:30:55,792 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;@628d710e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:30:55,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-10-17 10:30:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 10:30:55,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:55,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 10:30:55,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2022-10-17 10:30:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:55,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693724556] [2022-10-17 10:30:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693724556] [2022-10-17 10:30:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693724556] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:56,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:56,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:30:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772719947] [2022-10-17 10:30:56,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:56,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:30:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:30:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:30:56,350 INFO L87 Difference]: Start difference. First operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 states have internal predecessors, (99), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-10-17 10:30:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:56,645 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-10-17 10:30:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:30:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 [2022-10-17 10:30:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:56,666 INFO L225 Difference]: With dead ends: 105 [2022-10-17 10:30:56,667 INFO L226 Difference]: Without dead ends: 103 [2022-10-17 10:30:56,670 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 [2022-10-17 10:30:56,675 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 150 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:56,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 65 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:30:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-10-17 10:30:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2022-10-17 10:30:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-10-17 10:30:56,736 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 4 [2022-10-17 10:30:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:56,737 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-10-17 10:30:56,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-10-17 10:30:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-10-17 10:30:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 10:30:56,738 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:56,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 10:30:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:30:56,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2022-10-17 10:30:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:56,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861184327] [2022-10-17 10:30:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861184327] [2022-10-17 10:30:57,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861184327] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:57,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:57,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:30:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877475052] [2022-10-17 10:30:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:30:57,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:30:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:30:57,005 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-10-17 10:30:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:57,206 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-10-17 10:30:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:30:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 [2022-10-17 10:30:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:57,212 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:30:57,212 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:30:57,217 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 [2022-10-17 10:30:57,220 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 147 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:57,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 45 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:30:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:30:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-10-17 10:30:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-10-17 10:30:57,244 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 4 [2022-10-17 10:30:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:57,244 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-10-17 10:30:57,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2022-10-17 10:30:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-10-17 10:30:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 10:30:57,247 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:57,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 10:30:57,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:30:57,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2022-10-17 10:30:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123499445] [2022-10-17 10:30:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:57,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:57,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123499445] [2022-10-17 10:30:57,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123499445] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:57,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:57,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:30:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963266702] [2022-10-17 10:30:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:57,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:30:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:30:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:30:57,344 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:57,438 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-10-17 10:30:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:30:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 10:30:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:57,444 INFO L225 Difference]: With dead ends: 91 [2022-10-17 10:30:57,444 INFO L226 Difference]: Without dead ends: 91 [2022-10-17 10:30:57,444 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 [2022-10-17 10:30:57,453 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:57,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-17 10:30:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-10-17 10:30:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-10-17 10:30:57,466 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 5 [2022-10-17 10:30:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:57,466 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-10-17 10:30:57,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-10-17 10:30:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 10:30:57,467 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:57,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 10:30:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:30:57,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2022-10-17 10:30:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:57,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730865423] [2022-10-17 10:30:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730865423] [2022-10-17 10:30:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730865423] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:57,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:30:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390073317] [2022-10-17 10:30:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:57,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:30:57,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:30:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:30:57,573 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:57,644 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-10-17 10:30:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:30:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 10:30:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:57,646 INFO L225 Difference]: With dead ends: 78 [2022-10-17 10:30:57,646 INFO L226 Difference]: Without dead ends: 78 [2022-10-17 10:30:57,646 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 [2022-10-17 10:30:57,655 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:57,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 44 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-17 10:30:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-10-17 10:30:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.66) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-10-17 10:30:57,667 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 5 [2022-10-17 10:30:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:57,668 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-10-17 10:30:57,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-10-17 10:30:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:30:57,669 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:57,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:30:57,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2022-10-17 10:30:57,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352647724] [2022-10-17 10:30:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:58,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:58,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352647724] [2022-10-17 10:30:58,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352647724] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:58,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:58,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:30:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305466487] [2022-10-17 10:30:58,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:30:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:30:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:30:58,004 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:58,274 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-10-17 10:30:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:30:58,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:30:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:58,276 INFO L225 Difference]: With dead ends: 88 [2022-10-17 10:30:58,276 INFO L226 Difference]: Without dead ends: 88 [2022-10-17 10:30:58,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:30:58,279 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 14 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:58,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 348 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-17 10:30:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-10-17 10:30:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-10-17 10:30:58,304 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 10 [2022-10-17 10:30:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:58,308 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-10-17 10:30:58,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-10-17 10:30:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:30:58,310 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:58,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:58,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:30:58,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2022-10-17 10:30:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:58,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258079879] [2022-10-17 10:30:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:58,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258079879] [2022-10-17 10:30:58,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258079879] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:58,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:58,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:30:58,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513671039] [2022-10-17 10:30:58,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:58,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:30:58,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:30:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:30:58,629 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:58,809 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-10-17 10:30:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:30:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-10-17 10:30:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:58,811 INFO L225 Difference]: With dead ends: 91 [2022-10-17 10:30:58,811 INFO L226 Difference]: Without dead ends: 91 [2022-10-17 10:30:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:30:58,812 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 94 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-17 10:30:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-10-17 10:30:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-10-17 10:30:58,817 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 18 [2022-10-17 10:30:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:58,817 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-10-17 10:30:58,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-10-17 10:30:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:30:58,818 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:58,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:58,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:30:58,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2022-10-17 10:30:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:58,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832473675] [2022-10-17 10:30:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:59,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832473675] [2022-10-17 10:30:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832473675] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:59,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:30:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937487820] [2022-10-17 10:30:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:59,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:30:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:30:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:30:59,218 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:59,392 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-10-17 10:30:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:30:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-10-17 10:30:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:59,393 INFO L225 Difference]: With dead ends: 93 [2022-10-17 10:30:59,393 INFO L226 Difference]: Without dead ends: 93 [2022-10-17 10:30:59,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:30:59,395 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 203 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:59,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 92 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-10-17 10:30:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2022-10-17 10:30:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-10-17 10:30:59,408 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 18 [2022-10-17 10:30:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:59,408 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-10-17 10:30:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-10-17 10:30:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:30:59,410 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:59,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:30:59,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1257146476, now seen corresponding path program 1 times [2022-10-17 10:30:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032519244] [2022-10-17 10:30:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032519244] [2022-10-17 10:30:59,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032519244] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:59,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:59,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:30:59,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477094349] [2022-10-17 10:30:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:30:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:59,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:30:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:30:59,594 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:59,697 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-10-17 10:30:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:30:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-10-17 10:30:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:59,699 INFO L225 Difference]: With dead ends: 75 [2022-10-17 10:30:59,699 INFO L226 Difference]: Without dead ends: 75 [2022-10-17 10:30:59,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:30:59,700 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 84 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:59,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 107 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-17 10:30:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-10-17 10:30:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.54) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-10-17 10:30:59,707 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 20 [2022-10-17 10:30:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:59,707 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-10-17 10:30:59,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-10-17 10:30:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:30:59,709 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:59,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:30:59,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash -663319494, now seen corresponding path program 1 times [2022-10-17 10:30:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:59,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859713122] [2022-10-17 10:30:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:30:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:30:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:30:59,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:30:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859713122] [2022-10-17 10:30:59,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859713122] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:30:59,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:30:59,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:30:59,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575632504] [2022-10-17 10:30:59,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:30:59,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:30:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:30:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:30:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:30:59,836 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:30:59,948 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-10-17 10:30:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:30:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-10-17 10:30:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:30:59,950 INFO L225 Difference]: With dead ends: 74 [2022-10-17 10:30:59,950 INFO L226 Difference]: Without dead ends: 74 [2022-10-17 10:30:59,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:30:59,953 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:30:59,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:30:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-17 10:30:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-10-17 10:30:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.52) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-10-17 10:30:59,957 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 21 [2022-10-17 10:30:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:30:59,957 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-10-17 10:30:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:30:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-10-17 10:30:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:30:59,959 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:30:59,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:30:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:30:59,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:30:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:30:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -663319493, now seen corresponding path program 1 times [2022-10-17 10:30:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:30:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807756872] [2022-10-17 10:30:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:30:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:00,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807756872] [2022-10-17 10:31:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807756872] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685489689] [2022-10-17 10:31:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:31:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:31:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:00,453 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:00,651 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-10-17 10:31:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:31:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-10-17 10:31:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:00,653 INFO L225 Difference]: With dead ends: 73 [2022-10-17 10:31:00,653 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 10:31:00,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:00,654 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 98 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:00,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 117 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 10:31:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-17 10:31:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-10-17 10:31:00,657 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 21 [2022-10-17 10:31:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:00,658 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-10-17 10:31:00,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-10-17 10:31:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:31:00,659 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:00,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:00,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:31:00,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash 911932203, now seen corresponding path program 1 times [2022-10-17 10:31:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:00,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388144255] [2022-10-17 10:31:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:01,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:01,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388144255] [2022-10-17 10:31:01,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388144255] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:01,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:01,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:31:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955792465] [2022-10-17 10:31:01,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:31:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:31:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:01,231 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2022-10-17 10:31:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:01,891 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-10-17 10:31:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 10:31:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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 22 [2022-10-17 10:31:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:01,893 INFO L225 Difference]: With dead ends: 139 [2022-10-17 10:31:01,893 INFO L226 Difference]: Without dead ends: 139 [2022-10-17 10:31:01,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:31:01,894 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 289 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:01,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 204 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-10-17 10:31:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2022-10-17 10:31:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.40625) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-10-17 10:31:01,898 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 22 [2022-10-17 10:31:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:01,898 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-10-17 10:31:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2022-10-17 10:31:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-10-17 10:31:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:31:01,899 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:01,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:01,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:31:01,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2022-10-17 10:31:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:01,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091388020] [2022-10-17 10:31:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:01,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:02,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091388020] [2022-10-17 10:31:02,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091388020] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049085771] [2022-10-17 10:31:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:02,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:02,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:02,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:31:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 10:31:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:02,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:31:02,890 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-10-17 10:31:02,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-10-17 10:31:03,002 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-10-17 10:31:03,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2022-10-17 10:31:03,112 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 10:31:03,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-10-17 10:31:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:03,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:03,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-10-17 10:31:03,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:31:03,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 192 [2022-10-17 10:31:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:04,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049085771] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:31:04,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:31:04,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-10-17 10:31:04,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90396852] [2022-10-17 10:31:04,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:31:04,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:31:04,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:31:04,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:31:04,021 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:04,619 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2022-10-17 10:31:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:31:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-17 10:31:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:04,621 INFO L225 Difference]: With dead ends: 191 [2022-10-17 10:31:04,621 INFO L226 Difference]: Without dead ends: 191 [2022-10-17 10:31:04,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:31:04,623 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 299 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:04,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 407 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 425 Invalid, 0 Unknown, 228 Unchecked, 0.4s Time] [2022-10-17 10:31:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-10-17 10:31:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 95. [2022-10-17 10:31:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 94 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2022-10-17 10:31:04,627 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 22 [2022-10-17 10:31:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:04,628 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2022-10-17 10:31:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2022-10-17 10:31:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:31:04,630 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:04,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:04,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:04,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:31:04,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -428723025, now seen corresponding path program 1 times [2022-10-17 10:31:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:04,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476823626] [2022-10-17 10:31:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:04,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476823626] [2022-10-17 10:31:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476823626] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:31:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743805695] [2022-10-17 10:31:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:31:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:31:05,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:31:05,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:31:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:05,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjunts are in the unsatisfiable core [2022-10-17 10:31:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:31:05,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:31:05,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:31:05,939 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-10-17 10:31:05,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-10-17 10:31:05,958 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-10-17 10:31:05,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-10-17 10:31:06,067 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-10-17 10:31:06,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2022-10-17 10:31:06,089 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-10-17 10:31:06,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-10-17 10:31:06,221 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 10:31:06,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-10-17 10:31:06,232 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 10:31:06,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-10-17 10:31:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:06,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:31:06,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 10:31:06,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-10-17 10:31:06,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-10-17 10:31:15,007 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-17 10:31:15,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-10-17 10:31:15,122 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:31:15,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 100 [2022-10-17 10:31:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:15,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743805695] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:31:15,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:31:15,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2022-10-17 10:31:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644452473] [2022-10-17 10:31:15,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:31:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-17 10:31:15,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-17 10:31:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:31:15,293 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 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) [2022-10-17 10:31:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:16,285 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2022-10-17 10:31:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 10:31:16,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 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) Word has length 22 [2022-10-17 10:31:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:16,287 INFO L225 Difference]: With dead ends: 193 [2022-10-17 10:31:16,287 INFO L226 Difference]: Without dead ends: 193 [2022-10-17 10:31:16,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:31:16,289 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 400 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:16,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 529 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 466 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-10-17 10:31:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-10-17 10:31:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2022-10-17 10:31:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.375) internal successors, (99), 94 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-10-17 10:31:16,294 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 22 [2022-10-17 10:31:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:16,294 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-10-17 10:31:16,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 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) [2022-10-17 10:31:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-10-17 10:31:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:31:16,297 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:16,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:16,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:31:16,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd07cba-b3d3-4c61-ab66-563904ed9a28/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:31:16,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1794872678, now seen corresponding path program 1 times [2022-10-17 10:31:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:16,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310651973] [2022-10-17 10:31:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:17,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310651973] [2022-10-17 10:31:17,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310651973] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:17,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:17,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:31:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155440873] [2022-10-17 10:31:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:31:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:31:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:17,138 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:17,961 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-10-17 10:31:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 10:31:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-10-17 10:31:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:17,963 INFO L225 Difference]: With dead ends: 136 [2022-10-17 10:31:17,963 INFO L226 Difference]: Without dead ends: 136 [2022-10-17 10:31:17,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:31:17,964 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 275 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:17,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 153 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:31:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-17 10:31:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2022-10-17 10:31:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.36986301369863) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-10-17 10:31:17,968 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 23 [2022-10-17 10:31:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:17,968 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-10-17 10:31:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-10-17 10:31:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:31:17,973 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:17,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:31:17,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 193521933, now seen corresponding path program 1 times [2022-10-17 10:31:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:17,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593851380] [2022-10-17 10:31:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:18,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593851380] [2022-10-17 10:31:18,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593851380] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:18,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:18,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:31:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330330484] [2022-10-17 10:31:18,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:31:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:31:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:18,549 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:19,192 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-10-17 10:31:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:31:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-17 10:31:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:19,194 INFO L225 Difference]: With dead ends: 102 [2022-10-17 10:31:19,194 INFO L226 Difference]: Without dead ends: 102 [2022-10-17 10:31:19,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:31:19,195 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 177 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:19,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 179 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:31:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-10-17 10:31:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-10-17 10:31:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.364864864864865) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-10-17 10:31:19,200 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 24 [2022-10-17 10:31:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:19,201 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-10-17 10:31:19,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-10-17 10:31:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:31:19,202 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:19,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:19,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:31:19,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1704212733, now seen corresponding path program 1 times [2022-10-17 10:31:19,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:19,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954790328] [2022-10-17 10:31:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:19,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954790328] [2022-10-17 10:31:19,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954790328] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:19,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:19,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:31:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095013984] [2022-10-17 10:31:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:31:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:31:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:31:19,400 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:19,551 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-10-17 10:31:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:31:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:31:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:19,553 INFO L225 Difference]: With dead ends: 96 [2022-10-17 10:31:19,553 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 10:31:19,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:31:19,554 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:19,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 46 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 10:31:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-10-17 10:31:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-10-17 10:31:19,558 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 25 [2022-10-17 10:31:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-10-17 10:31:19,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-10-17 10:31:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:31:19,559 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:19,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:19,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:31:19,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1704212734, now seen corresponding path program 1 times [2022-10-17 10:31:19,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:19,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967460884] [2022-10-17 10:31:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:19,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:19,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967460884] [2022-10-17 10:31:19,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967460884] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:19,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:19,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:31:19,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348553220] [2022-10-17 10:31:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:31:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:31:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:19,683 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:19,739 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-10-17 10:31:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:31:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:31:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:19,741 INFO L225 Difference]: With dead ends: 90 [2022-10-17 10:31:19,741 INFO L226 Difference]: Without dead ends: 90 [2022-10-17 10:31:19,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:31:19,742 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:19,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 38 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-17 10:31:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-10-17 10:31:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-10-17 10:31:19,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 25 [2022-10-17 10:31:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:19,747 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-10-17 10:31:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-10-17 10:31:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:31:19,748 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:19,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:31:19,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1290987217, now seen corresponding path program 1 times [2022-10-17 10:31:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:19,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613812391] [2022-10-17 10:31:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613812391] [2022-10-17 10:31:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613812391] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:19,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:19,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39149846] [2022-10-17 10:31:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:31:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:31:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:19,903 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:19,993 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2022-10-17 10:31:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:31:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-10-17 10:31:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:19,995 INFO L225 Difference]: With dead ends: 89 [2022-10-17 10:31:19,995 INFO L226 Difference]: Without dead ends: 89 [2022-10-17 10:31:19,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:19,996 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:19,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 95 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-17 10:31:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-10-17 10:31:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 88 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-10-17 10:31:20,000 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 26 [2022-10-17 10:31:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:20,000 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-10-17 10:31:20,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-10-17 10:31:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:31:20,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:20,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:31:20,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1365898173, now seen corresponding path program 1 times [2022-10-17 10:31:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128305062] [2022-10-17 10:31:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128305062] [2022-10-17 10:31:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128305062] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:20,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:31:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522858603] [2022-10-17 10:31:20,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:31:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:31:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:31:20,187 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:20,314 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-10-17 10:31:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:31:20,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 10:31:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:20,315 INFO L225 Difference]: With dead ends: 88 [2022-10-17 10:31:20,315 INFO L226 Difference]: Without dead ends: 88 [2022-10-17 10:31:20,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:31:20,316 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:20,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 77 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-17 10:31:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-10-17 10:31:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-10-17 10:31:20,320 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 27 [2022-10-17 10:31:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:20,321 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-10-17 10:31:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-10-17 10:31:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:31:20,321 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:20,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:31:20,322 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash -606829485, now seen corresponding path program 1 times [2022-10-17 10:31:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:20,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305270387] [2022-10-17 10:31:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305270387] [2022-10-17 10:31:21,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305270387] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:21,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:21,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:31:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160744068] [2022-10-17 10:31:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 10:31:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 10:31:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:31:21,121 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:22,040 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-10-17 10:31:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:31:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-17 10:31:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:22,044 INFO L225 Difference]: With dead ends: 92 [2022-10-17 10:31:22,044 INFO L226 Difference]: Without dead ends: 92 [2022-10-17 10:31:22,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:31:22,046 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 163 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:22,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 206 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:31:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-17 10:31:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-10-17 10:31:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-10-17 10:31:22,050 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 28 [2022-10-17 10:31:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:22,050 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-10-17 10:31:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-10-17 10:31:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:31:22,051 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:22,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-17 10:31:22,051 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1631844736, now seen corresponding path program 1 times [2022-10-17 10:31:22,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:22,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934511765] [2022-10-17 10:31:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:22,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:22,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934511765] [2022-10-17 10:31:22,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934511765] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:22,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:22,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:31:22,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695333340] [2022-10-17 10:31:22,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:31:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:31:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:31:22,321 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:31:22,481 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-10-17 10:31:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:31:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-10-17 10:31:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:31:22,482 INFO L225 Difference]: With dead ends: 91 [2022-10-17 10:31:22,483 INFO L226 Difference]: Without dead ends: 91 [2022-10-17 10:31:22,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:31:22,484 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 104 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:31:22,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 62 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:31:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-17 10:31:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-10-17 10:31:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 90 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) [2022-10-17 10:31:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-10-17 10:31:22,487 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 29 [2022-10-17 10:31:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:31:22,488 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-10-17 10:31:22,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:31:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-10-17 10:31:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:31:22,489 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:31:22,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:31:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-17 10:31:22,490 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-10-17 10:31:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:31:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1014103174, now seen corresponding path program 1 times [2022-10-17 10:31:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:31:22,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663953837] [2022-10-17 10:31:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:31:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:31:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:31:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:31:24,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:31:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663953837] [2022-10-17 10:31:24,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663953837] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:31:24,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:31:24,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-10-17 10:31:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217287876] [2022-10-17 10:31:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:31:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:31:24,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:31:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:31:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:31:24,346 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)