./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 17:12:02,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:12:02,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:12:02,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:12:02,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:12:02,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:12:02,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:12:02,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:12:02,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:12:02,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:12:02,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:12:02,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:12:02,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:12:02,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:12:02,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:12:02,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:12:02,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:12:02,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:12:02,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:12:02,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:12:02,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:12:02,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:12:02,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:12:02,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:12:02,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:12:02,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:12:02,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:12:02,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:12:02,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:12:02,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:12:02,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:12:02,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:12:02,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:12:02,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:12:02,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:12:02,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:12:02,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:12:02,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:12:02,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:12:02,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:12:02,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:12:02,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 17:12:02,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:12:02,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:12:02,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:12:02,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:12:02,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:12:02,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:12:02,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:12:02,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:12:02,714 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:12:02,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:12:02,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:12:02,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:12:02,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:12:02,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:12:02,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:12:02,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 17:12:02,717 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 17:12:02,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 17:12:02,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:12:02,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:12:02,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:12:02,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:12:02,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:12:02,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:12:02,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:12:02,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:12:02,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:12:02,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:12:02,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:12:02,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:12:02,722 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_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 [2022-11-21 17:12:03,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:12:03,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:12:03,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:12:03,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:12:03,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:12:03,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2022-11-21 17:12:06,224 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:12:06,578 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:12:06,579 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2022-11-21 17:12:06,596 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/data/486c7386d/58581975e16b4c6ba7b555022bde8368/FLAGfe70b570a [2022-11-21 17:12:06,610 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/data/486c7386d/58581975e16b4c6ba7b555022bde8368 [2022-11-21 17:12:06,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:12:06,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:12:06,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:12:06,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:12:06,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:12:06,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:12:06" (1/1) ... [2022-11-21 17:12:06,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc100b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:06, skipping insertion in model container [2022-11-21 17:12:06,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:12:06" (1/1) ... [2022-11-21 17:12:06,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:12:06,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:12:06,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:12:07,007 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:12:07,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:12:07,094 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:12:07,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07 WrapperNode [2022-11-21 17:12:07,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:12:07,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:12:07,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:12:07,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:12:07,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,193 INFO L138 Inliner]: procedures = 123, calls = 49, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2022-11-21 17:12:07,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:12:07,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:12:07,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:12:07,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:12:07,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:12:07,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:12:07,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:12:07,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:12:07,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (1/1) ... [2022-11-21 17:12:07,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:12:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:07,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:12:07,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:12:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:12:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:12:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 17:12:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 17:12:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:12:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:12:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:12:07,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:12:07,524 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:12:07,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:12:08,067 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:12:08,075 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:12:08,075 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 17:12:08,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:12:08 BoogieIcfgContainer [2022-11-21 17:12:08,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:12:08,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:12:08,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:12:08,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:12:08,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:12:06" (1/3) ... [2022-11-21 17:12:08,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd98500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:12:08, skipping insertion in model container [2022-11-21 17:12:08,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:12:07" (2/3) ... [2022-11-21 17:12:08,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd98500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:12:08, skipping insertion in model container [2022-11-21 17:12:08,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:12:08" (3/3) ... [2022-11-21 17:12:08,087 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_parent_ptr.i [2022-11-21 17:12:08,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:12:08,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2022-11-21 17:12:08,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:12:08,187 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;@603b4fed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:12:08,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2022-11-21 17:12:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 17:12:08,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:08,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 17:12:08,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-21 17:12:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:08,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144289328] [2022-11-21 17:12:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:08,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144289328] [2022-11-21 17:12:08,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144289328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:08,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:08,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:12:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499791723] [2022-11-21 17:12:08,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:08,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:08,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:08,439 INFO L87 Difference]: Start difference. First operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:08,655 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2022-11-21 17:12:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-21 17:12:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:08,668 INFO L225 Difference]: With dead ends: 172 [2022-11-21 17:12:08,668 INFO L226 Difference]: Without dead ends: 168 [2022-11-21 17:12:08,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:08,673 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 120 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:08,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 128 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-21 17:12:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2022-11-21 17:12:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 149 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2022-11-21 17:12:08,779 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 3 [2022-11-21 17:12:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:08,780 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2022-11-21 17:12:08,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2022-11-21 17:12:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 17:12:08,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:08,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 17:12:08,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:12:08,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-21 17:12:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:08,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20058852] [2022-11-21 17:12:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:08,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:08,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20058852] [2022-11-21 17:12:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20058852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:08,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:08,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:12:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216812928] [2022-11-21 17:12:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:08,942 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:09,072 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2022-11-21 17:12:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:09,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-21 17:12:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:09,074 INFO L225 Difference]: With dead ends: 147 [2022-11-21 17:12:09,074 INFO L226 Difference]: Without dead ends: 147 [2022-11-21 17:12:09,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:09,075 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:09,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-21 17:12:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-21 17:12:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 146 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2022-11-21 17:12:09,086 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 3 [2022-11-21 17:12:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:09,086 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2022-11-21 17:12:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2022-11-21 17:12:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:12:09,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:09,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:09,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:12:09,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 59265651, now seen corresponding path program 1 times [2022-11-21 17:12:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:09,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363313242] [2022-11-21 17:12:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:09,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363313242] [2022-11-21 17:12:09,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363313242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:09,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:09,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:09,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262829468] [2022-11-21 17:12:09,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:09,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:12:09,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:12:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:12:09,191 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:09,446 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-11-21 17:12:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:12:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 17:12:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:09,451 INFO L225 Difference]: With dead ends: 153 [2022-11-21 17:12:09,452 INFO L226 Difference]: Without dead ends: 153 [2022-11-21 17:12:09,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:09,459 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 198 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:09,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 100 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:09,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-21 17:12:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2022-11-21 17:12:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.844155844155844) internal successors, (142), 130 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2022-11-21 17:12:09,477 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 8 [2022-11-21 17:12:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:09,478 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2022-11-21 17:12:09,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2022-11-21 17:12:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:12:09,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:09,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:09,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:12:09,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 59265652, now seen corresponding path program 1 times [2022-11-21 17:12:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:09,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283093581] [2022-11-21 17:12:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:09,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:09,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283093581] [2022-11-21 17:12:09,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283093581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:09,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:09,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51066879] [2022-11-21 17:12:09,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:09,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:12:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:12:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:12:09,682 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:09,934 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2022-11-21 17:12:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:12:09,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 17:12:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:09,936 INFO L225 Difference]: With dead ends: 186 [2022-11-21 17:12:09,937 INFO L226 Difference]: Without dead ends: 186 [2022-11-21 17:12:09,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:09,938 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 191 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:09,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 180 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-21 17:12:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 167. [2022-11-21 17:12:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.7168141592920354) internal successors, (194), 166 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2022-11-21 17:12:09,947 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 8 [2022-11-21 17:12:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:09,947 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2022-11-21 17:12:09,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2022-11-21 17:12:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 17:12:09,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:09,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:12:09,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237128, now seen corresponding path program 1 times [2022-11-21 17:12:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:09,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135901674] [2022-11-21 17:12:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135901674] [2022-11-21 17:12:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135901674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:10,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:10,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:12:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936441917] [2022-11-21 17:12:10,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:10,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,009 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:10,150 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-11-21 17:12:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 17:12:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:10,152 INFO L225 Difference]: With dead ends: 171 [2022-11-21 17:12:10,152 INFO L226 Difference]: Without dead ends: 171 [2022-11-21 17:12:10,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,154 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:10,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 199 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-21 17:12:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-11-21 17:12:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 166 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2022-11-21 17:12:10,162 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 9 [2022-11-21 17:12:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:10,162 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2022-11-21 17:12:10,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2022-11-21 17:12:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 17:12:10,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:10,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:10,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:12:10,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:10,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237129, now seen corresponding path program 1 times [2022-11-21 17:12:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:10,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114570039] [2022-11-21 17:12:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:10,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:10,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114570039] [2022-11-21 17:12:10,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114570039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:10,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:10,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:12:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087081769] [2022-11-21 17:12:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:10,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,316 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:10,463 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2022-11-21 17:12:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 17:12:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:10,465 INFO L225 Difference]: With dead ends: 169 [2022-11-21 17:12:10,465 INFO L226 Difference]: Without dead ends: 169 [2022-11-21 17:12:10,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,467 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:10,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-21 17:12:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2022-11-21 17:12:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6782608695652175) internal successors, (193), 164 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 193 transitions. [2022-11-21 17:12:10,490 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 193 transitions. Word has length 9 [2022-11-21 17:12:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:10,490 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 193 transitions. [2022-11-21 17:12:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 193 transitions. [2022-11-21 17:12:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:12:10,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:10,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:10,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:12:10,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 243138738, now seen corresponding path program 1 times [2022-11-21 17:12:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:10,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180499952] [2022-11-21 17:12:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180499952] [2022-11-21 17:12:10,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180499952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:10,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:10,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675403844] [2022-11-21 17:12:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:10,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:10,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,552 INFO L87 Difference]: Start difference. First operand 165 states and 193 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:10,573 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2022-11-21 17:12:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-21 17:12:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:10,575 INFO L225 Difference]: With dead ends: 166 [2022-11-21 17:12:10,575 INFO L226 Difference]: Without dead ends: 166 [2022-11-21 17:12:10,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:10,576 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:10,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 254 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:12:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-21 17:12:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-11-21 17:12:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6695652173913043) internal successors, (192), 164 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2022-11-21 17:12:10,582 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 13 [2022-11-21 17:12:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:10,583 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2022-11-21 17:12:10,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2022-11-21 17:12:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:12:10,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:10,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 17:12:10,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634445, now seen corresponding path program 1 times [2022-11-21 17:12:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:10,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839913279] [2022-11-21 17:12:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:10,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839913279] [2022-11-21 17:12:10,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839913279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:10,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:10,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650830645] [2022-11-21 17:12:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:10,708 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:10,926 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2022-11-21 17:12:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:12:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 17:12:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:10,927 INFO L225 Difference]: With dead ends: 178 [2022-11-21 17:12:10,928 INFO L226 Difference]: Without dead ends: 178 [2022-11-21 17:12:10,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:10,929 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 34 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:10,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 304 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-21 17:12:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2022-11-21 17:12:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 117 states have (on average 1.623931623931624) internal successors, (190), 161 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2022-11-21 17:12:10,933 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 14 [2022-11-21 17:12:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:10,933 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2022-11-21 17:12:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2022-11-21 17:12:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:12:10,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:10,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 17:12:10,938 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634444, now seen corresponding path program 1 times [2022-11-21 17:12:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652270716] [2022-11-21 17:12:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652270716] [2022-11-21 17:12:11,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652270716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:11,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:11,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:12:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832072617] [2022-11-21 17:12:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:11,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:12:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:12:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:12:11,196 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:11,504 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2022-11-21 17:12:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:12:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 17:12:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:11,506 INFO L225 Difference]: With dead ends: 201 [2022-11-21 17:12:11,506 INFO L226 Difference]: Without dead ends: 201 [2022-11-21 17:12:11,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:12:11,510 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 352 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:12:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-21 17:12:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2022-11-21 17:12:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 128 states have (on average 1.5859375) internal successors, (203), 168 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 203 transitions. [2022-11-21 17:12:11,518 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 203 transitions. Word has length 14 [2022-11-21 17:12:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:11,519 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 203 transitions. [2022-11-21 17:12:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 203 transitions. [2022-11-21 17:12:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:12:11,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:11,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:11,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:12:11,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 395262676, now seen corresponding path program 1 times [2022-11-21 17:12:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:11,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170792933] [2022-11-21 17:12:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:11,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170792933] [2022-11-21 17:12:11,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170792933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:11,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:11,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:11,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047578074] [2022-11-21 17:12:11,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:11,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:12:11,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:12:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:11,588 INFO L87 Difference]: Start difference. First operand 169 states and 203 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:11,601 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2022-11-21 17:12:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:12:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-21 17:12:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:11,602 INFO L225 Difference]: With dead ends: 171 [2022-11-21 17:12:11,603 INFO L226 Difference]: Without dead ends: 171 [2022-11-21 17:12:11,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:12:11,604 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:11,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:12:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-21 17:12:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-21 17:12:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.5769230769230769) internal successors, (205), 170 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2022-11-21 17:12:11,613 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 15 [2022-11-21 17:12:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:11,613 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2022-11-21 17:12:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2022-11-21 17:12:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:12:11,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:11,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:12:11,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1476383815, now seen corresponding path program 1 times [2022-11-21 17:12:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669814621] [2022-11-21 17:12:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:11,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:11,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:11,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669814621] [2022-11-21 17:12:11,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669814621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:11,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:11,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096729618] [2022-11-21 17:12:11,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:11,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:11,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:11,729 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:11,814 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2022-11-21 17:12:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:12:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-21 17:12:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:11,818 INFO L225 Difference]: With dead ends: 185 [2022-11-21 17:12:11,818 INFO L226 Difference]: Without dead ends: 185 [2022-11-21 17:12:11,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:12:11,819 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 61 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:11,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 309 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-21 17:12:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-11-21 17:12:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 171 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2022-11-21 17:12:11,830 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 17 [2022-11-21 17:12:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:11,831 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2022-11-21 17:12:11,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2022-11-21 17:12:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:12:11,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:11,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:11,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 17:12:11,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1645245929, now seen corresponding path program 1 times [2022-11-21 17:12:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:11,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277990709] [2022-11-21 17:12:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277990709] [2022-11-21 17:12:12,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277990709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:12,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:12,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:12:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542532784] [2022-11-21 17:12:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:12:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:12:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:12:12,171 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:12,413 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-11-21 17:12:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:12:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-21 17:12:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:12,415 INFO L225 Difference]: With dead ends: 209 [2022-11-21 17:12:12,415 INFO L226 Difference]: Without dead ends: 209 [2022-11-21 17:12:12,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:12:12,416 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 52 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:12,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 477 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-21 17:12:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 186. [2022-11-21 17:12:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 185 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2022-11-21 17:12:12,422 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 17 [2022-11-21 17:12:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:12,423 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2022-11-21 17:12:12,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2022-11-21 17:12:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:12:12,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:12,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:12,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 17:12:12,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631940, now seen corresponding path program 1 times [2022-11-21 17:12:12,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051601353] [2022-11-21 17:12:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051601353] [2022-11-21 17:12:12,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051601353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:12,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:12,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 17:12:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248299749] [2022-11-21 17:12:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:12,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:12:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:12:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:12:12,930 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:13,665 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-11-21 17:12:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:12:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-21 17:12:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:13,667 INFO L225 Difference]: With dead ends: 207 [2022-11-21 17:12:13,667 INFO L226 Difference]: Without dead ends: 207 [2022-11-21 17:12:13,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:12:13,668 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 281 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:13,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 383 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 17:12:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-21 17:12:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2022-11-21 17:12:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 150 states have (on average 1.54) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2022-11-21 17:12:13,674 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 19 [2022-11-21 17:12:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:13,674 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2022-11-21 17:12:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2022-11-21 17:12:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:12:13,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:13,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 17:12:13,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631939, now seen corresponding path program 1 times [2022-11-21 17:12:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146863771] [2022-11-21 17:12:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:14,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146863771] [2022-11-21 17:12:14,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146863771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:14,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:14,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 17:12:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760141476] [2022-11-21 17:12:14,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:14,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:12:14,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:12:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 17:12:14,230 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:15,050 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2022-11-21 17:12:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:12:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-21 17:12:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:15,052 INFO L225 Difference]: With dead ends: 260 [2022-11-21 17:12:15,052 INFO L226 Difference]: Without dead ends: 260 [2022-11-21 17:12:15,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:12:15,053 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 441 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:15,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 364 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:12:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-21 17:12:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2022-11-21 17:12:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 154 states have (on average 1.5324675324675325) internal successors, (236), 194 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2022-11-21 17:12:15,058 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 19 [2022-11-21 17:12:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:15,058 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2022-11-21 17:12:15,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2022-11-21 17:12:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:12:15,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:15,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:15,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 17:12:15,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash -825042817, now seen corresponding path program 1 times [2022-11-21 17:12:15,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:15,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467111021] [2022-11-21 17:12:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467111021] [2022-11-21 17:12:15,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467111021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:15,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:15,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21229675] [2022-11-21 17:12:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:15,178 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:15,367 INFO L93 Difference]: Finished difference Result 194 states and 234 transitions. [2022-11-21 17:12:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:12:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-21 17:12:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:15,368 INFO L225 Difference]: With dead ends: 194 [2022-11-21 17:12:15,369 INFO L226 Difference]: Without dead ends: 194 [2022-11-21 17:12:15,369 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 [2022-11-21 17:12:15,369 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 7 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:15,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 302 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-21 17:12:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-11-21 17:12:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 193 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2022-11-21 17:12:15,375 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 19 [2022-11-21 17:12:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:15,375 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2022-11-21 17:12:15,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2022-11-21 17:12:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:12:15,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:15,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:15,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 17:12:15,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -825042816, now seen corresponding path program 1 times [2022-11-21 17:12:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:15,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939712039] [2022-11-21 17:12:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939712039] [2022-11-21 17:12:15,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939712039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:15,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:15,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23468936] [2022-11-21 17:12:15,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:15,590 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:15,818 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2022-11-21 17:12:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:12:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-21 17:12:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:15,820 INFO L225 Difference]: With dead ends: 193 [2022-11-21 17:12:15,820 INFO L226 Difference]: Without dead ends: 193 [2022-11-21 17:12:15,821 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 [2022-11-21 17:12:15,821 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:15,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 280 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-21 17:12:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-21 17:12:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 154 states have (on average 1.5064935064935066) internal successors, (232), 192 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2022-11-21 17:12:15,827 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 19 [2022-11-21 17:12:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2022-11-21 17:12:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2022-11-21 17:12:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 17:12:15,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:15,828 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] [2022-11-21 17:12:15,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 17:12:15,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash -3442432, now seen corresponding path program 1 times [2022-11-21 17:12:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222641014] [2022-11-21 17:12:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:15,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:15,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222641014] [2022-11-21 17:12:15,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222641014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:15,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:15,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:12:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160370823] [2022-11-21 17:12:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:15,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:12:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:12:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:12:15,951 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:16,092 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2022-11-21 17:12:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:12:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 [2022-11-21 17:12:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:16,094 INFO L225 Difference]: With dead ends: 189 [2022-11-21 17:12:16,094 INFO L226 Difference]: Without dead ends: 189 [2022-11-21 17:12:16,094 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 [2022-11-21 17:12:16,095 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 169 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:16,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 81 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-21 17:12:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-11-21 17:12:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 184 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2022-11-21 17:12:16,099 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 22 [2022-11-21 17:12:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:16,100 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2022-11-21 17:12:16,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2022-11-21 17:12:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 17:12:16,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:16,101 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] [2022-11-21 17:12:16,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 17:12:16,101 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328411, now seen corresponding path program 1 times [2022-11-21 17:12:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:16,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134166056] [2022-11-21 17:12:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:16,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134166056] [2022-11-21 17:12:16,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134166056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:16,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:16,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:12:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819023114] [2022-11-21 17:12:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:12:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:16,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:12:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:12:16,319 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:16,671 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2022-11-21 17:12:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:12:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 17:12:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:16,672 INFO L225 Difference]: With dead ends: 187 [2022-11-21 17:12:16,672 INFO L226 Difference]: Without dead ends: 187 [2022-11-21 17:12:16,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:12:16,673 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 159 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:16,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 234 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:12:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-21 17:12:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-11-21 17:12:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.4509803921568627) internal successors, (222), 183 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2022-11-21 17:12:16,678 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 22 [2022-11-21 17:12:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:16,678 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2022-11-21 17:12:16,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2022-11-21 17:12:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 17:12:16,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:16,680 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] [2022-11-21 17:12:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 17:12:16,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328412, now seen corresponding path program 1 times [2022-11-21 17:12:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:16,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063265850] [2022-11-21 17:12:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:17,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063265850] [2022-11-21 17:12:17,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063265850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:17,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:17,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:12:17,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028888742] [2022-11-21 17:12:17,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:12:17,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:12:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:12:17,029 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:17,501 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2022-11-21 17:12:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:12:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 17:12:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:17,502 INFO L225 Difference]: With dead ends: 186 [2022-11-21 17:12:17,502 INFO L226 Difference]: Without dead ends: 186 [2022-11-21 17:12:17,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:12:17,503 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:17,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 306 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:12:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-21 17:12:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2022-11-21 17:12:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2022-11-21 17:12:17,509 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 22 [2022-11-21 17:12:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:17,510 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2022-11-21 17:12:17,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2022-11-21 17:12:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:12:17,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:17,512 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] [2022-11-21 17:12:17,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 17:12:17,512 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash -19499741, now seen corresponding path program 1 times [2022-11-21 17:12:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:17,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856132448] [2022-11-21 17:12:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:17,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:17,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856132448] [2022-11-21 17:12:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856132448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:17,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:17,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:17,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534353136] [2022-11-21 17:12:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:17,619 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-11-21 17:12:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:17,809 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-11-21 17:12:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:12:17,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 [2022-11-21 17:12:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:17,810 INFO L225 Difference]: With dead ends: 182 [2022-11-21 17:12:17,810 INFO L226 Difference]: Without dead ends: 182 [2022-11-21 17:12:17,811 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 [2022-11-21 17:12:17,811 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 7 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:17,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 271 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-21 17:12:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-21 17:12:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 181 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2022-11-21 17:12:17,816 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 23 [2022-11-21 17:12:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:17,816 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2022-11-21 17:12:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-11-21 17:12:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2022-11-21 17:12:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:12:17,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:17,817 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] [2022-11-21 17:12:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 17:12:17,818 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -19499740, now seen corresponding path program 1 times [2022-11-21 17:12:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400291425] [2022-11-21 17:12:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400291425] [2022-11-21 17:12:18,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400291425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:18,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:18,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:18,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385129488] [2022-11-21 17:12:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:18,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:18,011 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-11-21 17:12:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:18,200 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2022-11-21 17:12:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:12:18,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 [2022-11-21 17:12:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:18,202 INFO L225 Difference]: With dead ends: 181 [2022-11-21 17:12:18,202 INFO L226 Difference]: Without dead ends: 181 [2022-11-21 17:12:18,202 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 [2022-11-21 17:12:18,203 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 5 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:18,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 263 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-21 17:12:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-21 17:12:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 153 states have (on average 1.411764705882353) internal successors, (216), 180 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2022-11-21 17:12:18,207 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 23 [2022-11-21 17:12:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:18,209 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2022-11-21 17:12:18,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-11-21 17:12:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2022-11-21 17:12:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 17:12:18,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:18,210 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] [2022-11-21 17:12:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 17:12:18,211 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 998290617, now seen corresponding path program 1 times [2022-11-21 17:12:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152040336] [2022-11-21 17:12:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:18,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152040336] [2022-11-21 17:12:18,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152040336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:18,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:18,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:12:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756666001] [2022-11-21 17:12:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:18,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:12:18,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:18,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:12:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:12:18,556 INFO L87 Difference]: Start difference. First operand 181 states and 216 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) [2022-11-21 17:12:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:19,174 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2022-11-21 17:12:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:12:19,175 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 [2022-11-21 17:12:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:19,176 INFO L225 Difference]: With dead ends: 234 [2022-11-21 17:12:19,176 INFO L226 Difference]: Without dead ends: 234 [2022-11-21 17:12:19,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:12:19,176 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 351 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:19,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 484 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:12:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-21 17:12:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 194. [2022-11-21 17:12:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 166 states have (on average 1.4036144578313252) internal successors, (233), 193 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 233 transitions. [2022-11-21 17:12:19,181 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 233 transitions. Word has length 24 [2022-11-21 17:12:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:19,182 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 233 transitions. [2022-11-21 17:12:19,182 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) [2022-11-21 17:12:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 233 transitions. [2022-11-21 17:12:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 17:12:19,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:19,183 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] [2022-11-21 17:12:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 17:12:19,183 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash 998278641, now seen corresponding path program 1 times [2022-11-21 17:12:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724769620] [2022-11-21 17:12:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724769620] [2022-11-21 17:12:19,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724769620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:19,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:19,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:12:19,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497229742] [2022-11-21 17:12:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:19,293 INFO L87 Difference]: Start difference. First operand 194 states and 233 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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) [2022-11-21 17:12:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:19,447 INFO L93 Difference]: Finished difference Result 225 states and 270 transitions. [2022-11-21 17:12:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:12:19,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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 [2022-11-21 17:12:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:19,449 INFO L225 Difference]: With dead ends: 225 [2022-11-21 17:12:19,449 INFO L226 Difference]: Without dead ends: 225 [2022-11-21 17:12:19,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:19,450 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 151 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:19,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 117 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-21 17:12:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 172. [2022-11-21 17:12:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.36) internal successors, (204), 171 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2022-11-21 17:12:19,454 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 24 [2022-11-21 17:12:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2022-11-21 17:12:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 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) [2022-11-21 17:12:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2022-11-21 17:12:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:12:19,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:19,455 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] [2022-11-21 17:12:19,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 17:12:19,455 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 525851589, now seen corresponding path program 1 times [2022-11-21 17:12:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722094746] [2022-11-21 17:12:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722094746] [2022-11-21 17:12:20,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722094746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:20,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:20,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 17:12:20,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142355617] [2022-11-21 17:12:20,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:12:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:12:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:12:20,281 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 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) [2022-11-21 17:12:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:21,098 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-11-21 17:12:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:12:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 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 [2022-11-21 17:12:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:21,100 INFO L225 Difference]: With dead ends: 242 [2022-11-21 17:12:21,100 INFO L226 Difference]: Without dead ends: 242 [2022-11-21 17:12:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:12:21,101 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 288 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:21,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 373 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:12:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-21 17:12:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 172. [2022-11-21 17:12:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.3466666666666667) internal successors, (202), 171 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2022-11-21 17:12:21,105 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 25 [2022-11-21 17:12:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:21,106 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2022-11-21 17:12:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 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) [2022-11-21 17:12:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2022-11-21 17:12:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:12:21,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:21,107 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] [2022-11-21 17:12:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 17:12:21,107 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -896291290, now seen corresponding path program 1 times [2022-11-21 17:12:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767620183] [2022-11-21 17:12:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:21,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:21,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767620183] [2022-11-21 17:12:21,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767620183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:21,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:21,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:12:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961370184] [2022-11-21 17:12:21,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:12:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:12:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:12:21,397 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 17:12:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:21,778 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2022-11-21 17:12:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:12:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 [2022-11-21 17:12:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:21,779 INFO L225 Difference]: With dead ends: 187 [2022-11-21 17:12:21,780 INFO L226 Difference]: Without dead ends: 187 [2022-11-21 17:12:21,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:12:21,780 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 154 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:21,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 272 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:12:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-21 17:12:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2022-11-21 17:12:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2022-11-21 17:12:21,784 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 25 [2022-11-21 17:12:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:21,785 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2022-11-21 17:12:21,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 17:12:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2022-11-21 17:12:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:12:21,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:21,785 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] [2022-11-21 17:12:21,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 17:12:21,786 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -896291289, now seen corresponding path program 1 times [2022-11-21 17:12:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:21,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186024414] [2022-11-21 17:12:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:22,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186024414] [2022-11-21 17:12:22,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186024414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:22,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:22,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:12:22,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004705448] [2022-11-21 17:12:22,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:12:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:12:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:12:22,237 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 17:12:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:22,616 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2022-11-21 17:12:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 17:12:22,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 [2022-11-21 17:12:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:22,618 INFO L225 Difference]: With dead ends: 173 [2022-11-21 17:12:22,618 INFO L226 Difference]: Without dead ends: 173 [2022-11-21 17:12:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:12:22,619 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 138 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:22,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 224 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-21 17:12:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-11-21 17:12:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 150 states have (on average 1.32) internal successors, (198), 169 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2022-11-21 17:12:22,625 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 25 [2022-11-21 17:12:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:22,625 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2022-11-21 17:12:22,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 17:12:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2022-11-21 17:12:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 17:12:22,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:22,626 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] [2022-11-21 17:12:22,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 17:12:22,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103808, now seen corresponding path program 1 times [2022-11-21 17:12:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977901507] [2022-11-21 17:12:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:22,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977901507] [2022-11-21 17:12:22,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977901507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:22,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:22,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:12:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406222774] [2022-11-21 17:12:22,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:12:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:12:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:12:22,902 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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) [2022-11-21 17:12:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:23,238 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2022-11-21 17:12:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:12:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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 [2022-11-21 17:12:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:23,239 INFO L225 Difference]: With dead ends: 172 [2022-11-21 17:12:23,239 INFO L226 Difference]: Without dead ends: 172 [2022-11-21 17:12:23,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:12:23,240 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 132 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:23,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 222 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:12:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-21 17:12:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-11-21 17:12:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 150 states have (on average 1.3133333333333332) internal successors, (197), 168 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2022-11-21 17:12:23,245 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 26 [2022-11-21 17:12:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:23,245 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2022-11-21 17:12:23,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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) [2022-11-21 17:12:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2022-11-21 17:12:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 17:12:23,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:23,246 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] [2022-11-21 17:12:23,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-21 17:12:23,246 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103807, now seen corresponding path program 1 times [2022-11-21 17:12:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:23,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288940229] [2022-11-21 17:12:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:23,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288940229] [2022-11-21 17:12:23,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288940229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:12:23,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:12:23,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:12:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066376819] [2022-11-21 17:12:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:12:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:12:23,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:12:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:12:23,617 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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) [2022-11-21 17:12:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:24,100 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2022-11-21 17:12:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:12:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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 [2022-11-21 17:12:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:24,101 INFO L225 Difference]: With dead ends: 171 [2022-11-21 17:12:24,101 INFO L226 Difference]: Without dead ends: 171 [2022-11-21 17:12:24,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:12:24,102 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 125 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:24,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 303 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:12:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-21 17:12:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-11-21 17:12:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 150 states have (on average 1.3066666666666666) internal successors, (196), 167 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-11-21 17:12:24,106 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 26 [2022-11-21 17:12:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:24,107 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-11-21 17:12:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 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) [2022-11-21 17:12:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-11-21 17:12:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 17:12:24,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:24,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:24,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 17:12:24,110 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1722459940, now seen corresponding path program 1 times [2022-11-21 17:12:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:24,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849670237] [2022-11-21 17:12:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:24,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849670237] [2022-11-21 17:12:24,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849670237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055973358] [2022-11-21 17:12:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:24,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:24,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:24,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:12:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:12:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:24,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:12:24,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:12:24,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 17:12:24,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 17:12:24,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 17:12:24,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 17:12:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:24,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:12:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055973358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:12:24,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:12:24,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-21 17:12:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079120521] [2022-11-21 17:12:24,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:12:24,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:12:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:24,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:12:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:12:24,812 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 5 states, 5 states have (on average 5.4) 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) [2022-11-21 17:12:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:24,925 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2022-11-21 17:12:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:12:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) 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 [2022-11-21 17:12:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:24,927 INFO L225 Difference]: With dead ends: 174 [2022-11-21 17:12:24,927 INFO L226 Difference]: Without dead ends: 174 [2022-11-21 17:12:24,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:12:24,928 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 12 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:24,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 341 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:12:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-21 17:12:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-11-21 17:12:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 152 states have (on average 1.3026315789473684) internal successors, (198), 169 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2022-11-21 17:12:24,933 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 27 [2022-11-21 17:12:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:24,933 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2022-11-21 17:12:24,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) 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) [2022-11-21 17:12:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2022-11-21 17:12:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 17:12:24,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:24,934 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] [2022-11-21 17:12:24,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:12:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 17:12:25,142 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:12:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1856650752, now seen corresponding path program 1 times [2022-11-21 17:12:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:25,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457545403] [2022-11-21 17:12:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:25,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457545403] [2022-11-21 17:12:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457545403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:25,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118539625] [2022-11-21 17:12:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:25,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:25,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:25,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:12:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 17:12:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:26,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:12:26,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:12:26,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2022-11-21 17:12:26,478 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:12:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 34 [2022-11-21 17:12:26,635 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~n~0#1.base| Int) (|ULTIMATE.start_main_~st~0#1.base| Int) (v_DerPreprocessor_2 Int)) (let ((.cse0 (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~st~0#1.base| 0) |ULTIMATE.start_main_~n~0#1.base| v_DerPreprocessor_2) |ULTIMATE.start_main_~st~0#1.base| 0))) (and (= |c_#valid| (store .cse0 |ULTIMATE.start_main_~n~0#1.base| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~n~0#1.base|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~st~0#1.base|) 0) (= v_DerPreprocessor_2 (select .cse0 |ULTIMATE.start_main_~n~0#1.base|))))) is different from true [2022-11-21 17:12:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-21 17:12:26,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:12:26,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-21 17:12:26,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-21 17:13:05,095 WARN L233 SmtUtils]: Spent 32.09s on a formula simplification. DAG size of input: 25 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:13:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:05,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118539625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:13:05,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:13:05,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-11-21 17:13:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696665444] [2022-11-21 17:13:05,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:13:05,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 17:13:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 17:13:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=485, Unknown=2, NotChecked=44, Total=600 [2022-11-21 17:13:05,372 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:07,360 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-11-21 17:13:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:13:07,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2022-11-21 17:13:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:07,362 INFO L225 Difference]: With dead ends: 211 [2022-11-21 17:13:07,362 INFO L226 Difference]: Without dead ends: 205 [2022-11-21 17:13:07,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=151, Invalid=907, Unknown=2, NotChecked=62, Total=1122 [2022-11-21 17:13:07,363 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 110 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:07,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 704 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 937 Invalid, 1 Unknown, 129 Unchecked, 1.3s Time] [2022-11-21 17:13:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-21 17:13:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 185. [2022-11-21 17:13:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 167 states have (on average 1.281437125748503) internal successors, (214), 184 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2022-11-21 17:13:07,370 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 28 [2022-11-21 17:13:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:07,370 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2022-11-21 17:13:07,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2022-11-21 17:13:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 17:13:07,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:07,371 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] [2022-11-21 17:13:07,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:13:07,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:07,572 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash 607909674, now seen corresponding path program 1 times [2022-11-21 17:13:07,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:07,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866060330] [2022-11-21 17:13:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:07,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:07,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866060330] [2022-11-21 17:13:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866060330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:13:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728282422] [2022-11-21 17:13:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:13:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:13:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:13:07,886 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-11-21 17:13:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:08,343 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2022-11-21 17:13:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:13:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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 [2022-11-21 17:13:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:08,344 INFO L225 Difference]: With dead ends: 190 [2022-11-21 17:13:08,345 INFO L226 Difference]: Without dead ends: 190 [2022-11-21 17:13:08,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:13:08,345 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 130 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:08,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 269 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:13:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-21 17:13:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-11-21 17:13:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 183 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2022-11-21 17:13:08,350 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 29 [2022-11-21 17:13:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:08,350 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2022-11-21 17:13:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-11-21 17:13:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2022-11-21 17:13:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 17:13:08,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:08,350 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] [2022-11-21 17:13:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-21 17:13:08,352 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:08,353 INFO L85 PathProgramCache]: Analyzing trace with hash 607909675, now seen corresponding path program 1 times [2022-11-21 17:13:08,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:08,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143119248] [2022-11-21 17:13:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:08,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:09,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:09,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143119248] [2022-11-21 17:13:09,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143119248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:09,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:09,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 17:13:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627890320] [2022-11-21 17:13:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:13:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:13:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-21 17:13:09,034 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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) [2022-11-21 17:13:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:09,739 INFO L93 Difference]: Finished difference Result 230 states and 266 transitions. [2022-11-21 17:13:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 17:13:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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 [2022-11-21 17:13:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:09,740 INFO L225 Difference]: With dead ends: 230 [2022-11-21 17:13:09,740 INFO L226 Difference]: Without dead ends: 230 [2022-11-21 17:13:09,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:13:09,741 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 274 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:09,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 349 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:13:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-21 17:13:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2022-11-21 17:13:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 214 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 249 transitions. [2022-11-21 17:13:09,746 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 249 transitions. Word has length 29 [2022-11-21 17:13:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:09,746 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 249 transitions. [2022-11-21 17:13:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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) [2022-11-21 17:13:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 249 transitions. [2022-11-21 17:13:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 17:13:09,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:09,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-21 17:13:09,749 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 997305066, now seen corresponding path program 1 times [2022-11-21 17:13:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896555843] [2022-11-21 17:13:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896555843] [2022-11-21 17:13:09,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896555843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:09,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:09,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:13:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627756707] [2022-11-21 17:13:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:13:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:13:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:13:09,909 INFO L87 Difference]: Start difference. First operand 215 states and 249 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:10,196 INFO L93 Difference]: Finished difference Result 232 states and 261 transitions. [2022-11-21 17:13:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:13:10,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2022-11-21 17:13:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:10,198 INFO L225 Difference]: With dead ends: 232 [2022-11-21 17:13:10,198 INFO L226 Difference]: Without dead ends: 232 [2022-11-21 17:13:10,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:13:10,199 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 122 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:10,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 203 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:13:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-21 17:13:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2022-11-21 17:13:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 214 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2022-11-21 17:13:10,205 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 31 [2022-11-21 17:13:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:10,205 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2022-11-21 17:13:10,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2022-11-21 17:13:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 17:13:10,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:10,206 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] [2022-11-21 17:13:10,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-21 17:13:10,207 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash 851686138, now seen corresponding path program 1 times [2022-11-21 17:13:10,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:10,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328718710] [2022-11-21 17:13:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:10,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328718710] [2022-11-21 17:13:10,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328718710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:10,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:10,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:13:10,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477075856] [2022-11-21 17:13:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:10,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:13:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:13:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:13:10,281 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:10,346 INFO L93 Difference]: Finished difference Result 243 states and 273 transitions. [2022-11-21 17:13:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:13:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-21 17:13:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:10,348 INFO L225 Difference]: With dead ends: 243 [2022-11-21 17:13:10,348 INFO L226 Difference]: Without dead ends: 243 [2022-11-21 17:13:10,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:13:10,352 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:10,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 262 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:13:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-21 17:13:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2022-11-21 17:13:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 214 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2022-11-21 17:13:10,358 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 32 [2022-11-21 17:13:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:10,359 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2022-11-21 17:13:10,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2022-11-21 17:13:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:13:10,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:10,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-21 17:13:10,360 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1155721340, now seen corresponding path program 1 times [2022-11-21 17:13:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561804465] [2022-11-21 17:13:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:11,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561804465] [2022-11-21 17:13:11,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561804465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:11,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:11,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-21 17:13:11,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290831206] [2022-11-21 17:13:11,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:11,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:13:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:13:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:13:11,365 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:12,654 INFO L93 Difference]: Finished difference Result 244 states and 276 transitions. [2022-11-21 17:13:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:13:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-21 17:13:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:12,664 INFO L225 Difference]: With dead ends: 244 [2022-11-21 17:13:12,665 INFO L226 Difference]: Without dead ends: 237 [2022-11-21 17:13:12,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2022-11-21 17:13:12,668 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 319 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:12,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 447 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:13:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-21 17:13:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2022-11-21 17:13:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 196 states have (on average 1.239795918367347) internal successors, (243), 212 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2022-11-21 17:13:12,691 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 38 [2022-11-21 17:13:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:12,691 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2022-11-21 17:13:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2022-11-21 17:13:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:13:12,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:12,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-21 17:13:12,693 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1546128188, now seen corresponding path program 1 times [2022-11-21 17:13:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768509643] [2022-11-21 17:13:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:12,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768509643] [2022-11-21 17:13:13,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768509643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:13:13,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:13:13,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 17:13:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458225643] [2022-11-21 17:13:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:13:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:13:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:13:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:13:13,787 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:13:15,114 INFO L93 Difference]: Finished difference Result 230 states and 260 transitions. [2022-11-21 17:13:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:13:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-21 17:13:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:13:15,122 INFO L225 Difference]: With dead ends: 230 [2022-11-21 17:13:15,122 INFO L226 Difference]: Without dead ends: 204 [2022-11-21 17:13:15,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-11-21 17:13:15,123 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 355 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:13:15,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 527 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:13:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-21 17:13:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-11-21 17:13:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 183 states have (on average 1.2513661202185793) internal successors, (229), 199 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2022-11-21 17:13:15,129 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 38 [2022-11-21 17:13:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:13:15,129 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2022-11-21 17:13:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:13:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2022-11-21 17:13:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 17:13:15,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:13:15,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-21 17:13:15,131 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-21 17:13:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -936117449, now seen corresponding path program 1 times [2022-11-21 17:13:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283975379] [2022-11-21 17:13:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283975379] [2022-11-21 17:13:15,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283975379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:13:15,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438787480] [2022-11-21 17:13:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:15,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:13:15,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:13:15,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09369b1e-f369-4c63-a169-01e028677268/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:13:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-21 17:13:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:13:16,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 17:13:16,850 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-11-21 17:13:16,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-21 17:13:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:13:16,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 17:13:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:13:16,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 17:13:17,230 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:13:17,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-11-21 17:13:17,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-21 17:13:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:13:17,440 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2022-11-21 17:13:17,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 46 [2022-11-21 17:13:17,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-21 17:13:17,753 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-21 17:13:17,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 65 [2022-11-21 17:13:17,768 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:13:17,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-21 17:13:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-21 17:13:17,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-11-21 17:13:17,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 17:13:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:17,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:13:23,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:13:23,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 497 treesize of output 328 [2022-11-21 17:13:23,702 INFO L321 Elim1Store]: treesize reduction 20, result has 61.5 percent of original size [2022-11-21 17:13:23,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1941 treesize of output 1751 [2022-11-21 17:13:23,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1851 treesize of output 1659 [2022-11-21 17:13:24,102 INFO L321 Elim1Store]: treesize reduction 128, result has 43.9 percent of original size [2022-11-21 17:13:24,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 21963 treesize of output 19474 [2022-11-21 17:13:24,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:13:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21109 treesize of output 17765 [2022-11-21 17:13:25,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:13:25,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 17696 treesize of output 17776 [2022-11-21 17:13:26,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17618 treesize of output 17480