./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --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 ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:56:57,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:56:57,247 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:56:57,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:56:57,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:56:57,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:56:57,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:56:57,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:56:57,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:56:57,284 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:56:57,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:56:57,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:56:57,287 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:56:57,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:56:57,288 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:56:57,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:56:57,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:56:57,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:56:57,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:56:57,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:56:57,292 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:56:57,297 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:56:57,298 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:56:57,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:56:57,298 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:56:57,299 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:56:57,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:56:57,300 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:56:57,301 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:56:57,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:56:57,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:56:57,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:56:57,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:57,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:56:57,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:56:57,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:56:57,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:56:57,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:56:57,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:56:57,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:56:57,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:56:57,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 [2023-11-24 21:56:57,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:56:57,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:56:57,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:56:57,686 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:56:57,687 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:56:57,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2023-11-24 21:57:00,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:57:01,123 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:57:01,124 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2023-11-24 21:57:01,144 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/data/97255d883/885dbf2ede5e40cbb6c8497b968dfe20/FLAGea66b8cd6 [2023-11-24 21:57:01,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/data/97255d883/885dbf2ede5e40cbb6c8497b968dfe20 [2023-11-24 21:57:01,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:57:01,165 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:57:01,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:01,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:57:01,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:57:01,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48fe997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01, skipping insertion in model container [2023-11-24 21:57:01,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,218 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:57:01,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:01,638 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:57:01,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:57:01,713 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:57:01,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01 WrapperNode [2023-11-24 21:57:01,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:57:01,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:01,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:57:01,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:57:01,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,748 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,775 INFO L138 Inliner]: procedures = 123, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-11-24 21:57:01,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:57:01,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:57:01,776 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:57:01,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:57:01,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,792 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,809 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 12 writes are split as follows [0, 12]. [2023-11-24 21:57:01,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,836 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:57:01,841 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:57:01,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:57:01,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:57:01,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (1/1) ... [2023-11-24 21:57:01,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:57:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:01,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:57:01,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:57:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:57:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:57:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:57:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:57:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:57:02,045 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:57:02,048 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:57:02,494 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:57:02,542 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:57:02,543 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:57:02,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:02 BoogieIcfgContainer [2023-11-24 21:57:02,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:57:02,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:57:02,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:57:02,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:57:02,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:57:01" (1/3) ... [2023-11-24 21:57:02,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429b5b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:02, skipping insertion in model container [2023-11-24 21:57:02,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:57:01" (2/3) ... [2023-11-24 21:57:02,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429b5b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:57:02, skipping insertion in model container [2023-11-24 21:57:02,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:57:02" (3/3) ... [2023-11-24 21:57:02,554 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0504_1.i [2023-11-24 21:57:02,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:57:02,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-11-24 21:57:02,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:57:02,648 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44b5dcc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:57:02,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-24 21:57:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 42 states have (on average 2.357142857142857) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:57:02,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:02,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:57:02,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:02,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash 6302076, now seen corresponding path program 1 times [2023-11-24 21:57:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693771625] [2023-11-24 21:57:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:02,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693771625] [2023-11-24 21:57:02,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693771625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:02,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:02,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:02,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509389949] [2023-11-24 21:57:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:02,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:57:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:57:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:57:02,900 INFO L87 Difference]: Start difference. First operand has 86 states, 42 states have (on average 2.357142857142857) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:02,952 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-11-24 21:57:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:57:02,956 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 21:57:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:02,968 INFO L225 Difference]: With dead ends: 86 [2023-11-24 21:57:02,969 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 21:57:02,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:57:02,977 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:02,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:57:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 21:57:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-24 21:57:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-11-24 21:57:03,026 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 4 [2023-11-24 21:57:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,026 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-11-24 21:57:03,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-11-24 21:57:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:57:03,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:57:03,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:03,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1666677727, now seen corresponding path program 1 times [2023-11-24 21:57:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136620020] [2023-11-24 21:57:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:03,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136620020] [2023-11-24 21:57:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136620020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:03,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582849152] [2023-11-24 21:57:03,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:03,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:03,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,153 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:03,206 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-11-24 21:57:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:57:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:03,209 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:57:03,209 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 21:57:03,210 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 [2023-11-24 21:57:03,211 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:03,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:57:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 21:57:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2023-11-24 21:57:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 2.130434782608696) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2023-11-24 21:57:03,224 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 6 [2023-11-24 21:57:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,224 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2023-11-24 21:57:03,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2023-11-24 21:57:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:57:03,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:57:03,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:03,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1666676706, now seen corresponding path program 1 times [2023-11-24 21:57:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970895133] [2023-11-24 21:57:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:03,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970895133] [2023-11-24 21:57:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970895133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:03,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648770451] [2023-11-24 21:57:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:03,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,342 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:03,467 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-11-24 21:57:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:57:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:03,470 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:57:03,470 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:57:03,470 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 [2023-11-24 21:57:03,472 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:03,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 73 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:57:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-24 21:57:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 80 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-11-24 21:57:03,482 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2023-11-24 21:57:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,483 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-11-24 21:57:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-11-24 21:57:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:57:03,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:57:03,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:03,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1666676707, now seen corresponding path program 1 times [2023-11-24 21:57:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690932895] [2023-11-24 21:57:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:03,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690932895] [2023-11-24 21:57:03,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690932895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:03,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:03,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3326987] [2023-11-24 21:57:03,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:03,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,602 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:03,717 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2023-11-24 21:57:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:57:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:03,719 INFO L225 Difference]: With dead ends: 86 [2023-11-24 21:57:03,719 INFO L226 Difference]: Without dead ends: 86 [2023-11-24 21:57:03,721 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 [2023-11-24 21:57:03,732 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:03,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-24 21:57:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2023-11-24 21:57:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.830188679245283) internal successors, (97), 82 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-11-24 21:57:03,757 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 6 [2023-11-24 21:57:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,757 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-11-24 21:57:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-11-24 21:57:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:57:03,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:57:03,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:03,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,760 INFO L85 PathProgramCache]: Analyzing trace with hash 127401718, now seen corresponding path program 1 times [2023-11-24 21:57:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886056220] [2023-11-24 21:57:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:03,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886056220] [2023-11-24 21:57:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886056220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:03,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:03,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:57:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645564985] [2023-11-24 21:57:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,821 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:03,890 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2023-11-24 21:57:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 21:57:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:03,893 INFO L225 Difference]: With dead ends: 85 [2023-11-24 21:57:03,893 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 21:57:03,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,894 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:03,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 21:57:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-24 21:57:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-11-24 21:57:03,903 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 7 [2023-11-24 21:57:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,903 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-11-24 21:57:03,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-11-24 21:57:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:57:03,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:57:03,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:03,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1063044748, now seen corresponding path program 1 times [2023-11-24 21:57:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485628421] [2023-11-24 21:57:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:04,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485628421] [2023-11-24 21:57:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485628421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:04,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:04,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33603859] [2023-11-24 21:57:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:04,344 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2023-11-24 21:57:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:04,476 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-11-24 21:57:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:04,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 [2023-11-24 21:57:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:04,480 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:57:04,481 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:57:04,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:57:04,490 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:04,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:57:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2023-11-24 21:57:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2023-11-24 21:57:04,497 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 15 [2023-11-24 21:57:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:04,497 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2023-11-24 21:57:04,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2023-11-24 21:57:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2023-11-24 21:57:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:57:04,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:04,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:57:04,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:04,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1405381866, now seen corresponding path program 1 times [2023-11-24 21:57:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:04,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575770913] [2023-11-24 21:57:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:04,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575770913] [2023-11-24 21:57:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575770913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:04,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:04,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127831118] [2023-11-24 21:57:04,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:04,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:04,641 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:04,681 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2023-11-24 21:57:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:57:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:04,684 INFO L225 Difference]: With dead ends: 101 [2023-11-24 21:57:04,684 INFO L226 Difference]: Without dead ends: 101 [2023-11-24 21:57:04,684 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 [2023-11-24 21:57:04,685 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:04,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 128 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:57:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-24 21:57:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2023-11-24 21:57:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 64 states have (on average 1.734375) internal successors, (111), 90 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2023-11-24 21:57:04,715 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 16 [2023-11-24 21:57:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:04,715 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2023-11-24 21:57:04,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2023-11-24 21:57:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:57:04,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:04,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:04,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:57:04,718 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:04,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1405351175, now seen corresponding path program 1 times [2023-11-24 21:57:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521962448] [2023-11-24 21:57:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:04,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:04,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521962448] [2023-11-24 21:57:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521962448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:04,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212998137] [2023-11-24 21:57:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:04,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:04,833 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:04,902 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2023-11-24 21:57:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:57:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:04,905 INFO L225 Difference]: With dead ends: 87 [2023-11-24 21:57:04,905 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 21:57:04,905 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 [2023-11-24 21:57:04,907 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:04,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 86 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 21:57:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-11-24 21:57:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.609375) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2023-11-24 21:57:04,922 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 16 [2023-11-24 21:57:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:04,923 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2023-11-24 21:57:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2023-11-24 21:57:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:57:04,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:04,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:04,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:57:04,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:04,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1405351174, now seen corresponding path program 1 times [2023-11-24 21:57:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:04,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147451048] [2023-11-24 21:57:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:05,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147451048] [2023-11-24 21:57:05,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147451048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:05,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:05,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744068006] [2023-11-24 21:57:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:05,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:05,069 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:05,125 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2023-11-24 21:57:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:57:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:05,127 INFO L225 Difference]: With dead ends: 83 [2023-11-24 21:57:05,128 INFO L226 Difference]: Without dead ends: 83 [2023-11-24 21:57:05,128 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 [2023-11-24 21:57:05,130 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:05,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 91 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-24 21:57:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-24 21:57:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.484375) internal successors, (95), 82 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-11-24 21:57:05,138 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 16 [2023-11-24 21:57:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:05,138 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-11-24 21:57:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-11-24 21:57:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:57:05,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:05,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:57:05,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:05,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1922638355, now seen corresponding path program 1 times [2023-11-24 21:57:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236739101] [2023-11-24 21:57:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236739101] [2023-11-24 21:57:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236739101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:05,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:57:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154383989] [2023-11-24 21:57:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:57:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:57:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:57:05,492 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:05,653 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2023-11-24 21:57:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:57:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:05,655 INFO L225 Difference]: With dead ends: 115 [2023-11-24 21:57:05,655 INFO L226 Difference]: Without dead ends: 115 [2023-11-24 21:57:05,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:57:05,656 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:05,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 197 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:05,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-24 21:57:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2023-11-24 21:57:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.4625) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-11-24 21:57:05,661 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 18 [2023-11-24 21:57:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:05,661 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-11-24 21:57:05,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-11-24 21:57:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:57:05,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:05,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:05,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:57:05,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:05,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1922638354, now seen corresponding path program 1 times [2023-11-24 21:57:05,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:05,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777324409] [2023-11-24 21:57:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:05,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777324409] [2023-11-24 21:57:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777324409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:06,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:06,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:57:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766268444] [2023-11-24 21:57:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:57:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:57:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:57:06,400 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:06,787 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2023-11-24 21:57:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:57:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:57:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:06,789 INFO L225 Difference]: With dead ends: 114 [2023-11-24 21:57:06,789 INFO L226 Difference]: Without dead ends: 114 [2023-11-24 21:57:06,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:57:06,790 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 100 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:06,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 240 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-24 21:57:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2023-11-24 21:57:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.4375) internal successors, (115), 98 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-11-24 21:57:06,794 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 18 [2023-11-24 21:57:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:06,794 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-11-24 21:57:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-11-24 21:57:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:57:06,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:06,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:57:06,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:06,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1629477680, now seen corresponding path program 1 times [2023-11-24 21:57:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686578154] [2023-11-24 21:57:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686578154] [2023-11-24 21:57:06,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686578154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:06,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:06,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662649008] [2023-11-24 21:57:06,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:06,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:06,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:06,868 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:06,986 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2023-11-24 21:57:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:57:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:57:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:06,987 INFO L225 Difference]: With dead ends: 107 [2023-11-24 21:57:06,988 INFO L226 Difference]: Without dead ends: 107 [2023-11-24 21:57:06,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:06,989 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:06,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-24 21:57:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2023-11-24 21:57:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.451219512195122) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-11-24 21:57:06,993 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 21 [2023-11-24 21:57:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:06,994 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-11-24 21:57:06,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-11-24 21:57:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:57:06,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:06,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:57:06,996 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:06,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1629477681, now seen corresponding path program 1 times [2023-11-24 21:57:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968452288] [2023-11-24 21:57:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:06,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:07,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968452288] [2023-11-24 21:57:07,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968452288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:07,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:07,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:07,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034067956] [2023-11-24 21:57:07,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:07,119 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:07,243 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2023-11-24 21:57:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:57:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:57:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:07,245 INFO L225 Difference]: With dead ends: 134 [2023-11-24 21:57:07,245 INFO L226 Difference]: Without dead ends: 134 [2023-11-24 21:57:07,246 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 [2023-11-24 21:57:07,246 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:07,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-24 21:57:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2023-11-24 21:57:07,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 105 states have (on average 1.438095238095238) internal successors, (151), 123 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2023-11-24 21:57:07,252 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 21 [2023-11-24 21:57:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:07,253 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2023-11-24 21:57:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2023-11-24 21:57:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:57:07,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:07,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:07,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:57:07,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:07,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1025799739, now seen corresponding path program 1 times [2023-11-24 21:57:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:07,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856742647] [2023-11-24 21:57:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856742647] [2023-11-24 21:57:07,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856742647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:07,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093100460] [2023-11-24 21:57:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:07,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:07,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:07,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:07,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:57:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:57:07,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:07,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093100460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:07,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:57:07,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-24 21:57:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045512852] [2023-11-24 21:57:07,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:07,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:07,572 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2023-11-24 21:57:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:07,606 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2023-11-24 21:57:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2023-11-24 21:57:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:07,608 INFO L225 Difference]: With dead ends: 124 [2023-11-24 21:57:07,608 INFO L226 Difference]: Without dead ends: 124 [2023-11-24 21:57:07,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:07,609 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 68 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:07,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 86 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:57:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-24 21:57:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-24 21:57:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 123 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 149 transitions. [2023-11-24 21:57:07,614 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 149 transitions. Word has length 22 [2023-11-24 21:57:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:07,615 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 149 transitions. [2023-11-24 21:57:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2023-11-24 21:57:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 149 transitions. [2023-11-24 21:57:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:57:07,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:07,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:07,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:07,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:57:07,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:07,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1025797615, now seen corresponding path program 1 times [2023-11-24 21:57:07,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47906975] [2023-11-24 21:57:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:07,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:07,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47906975] [2023-11-24 21:57:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47906975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:07,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993140157] [2023-11-24 21:57:07,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:07,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:07,913 INFO L87 Difference]: Start difference. First operand 124 states and 149 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) [2023-11-24 21:57:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:08,121 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2023-11-24 21:57:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:57:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 [2023-11-24 21:57:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:08,122 INFO L225 Difference]: With dead ends: 149 [2023-11-24 21:57:08,122 INFO L226 Difference]: Without dead ends: 149 [2023-11-24 21:57:08,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:08,123 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:08,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 123 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-24 21:57:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2023-11-24 21:57:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 132 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2023-11-24 21:57:08,128 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 22 [2023-11-24 21:57:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:08,128 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2023-11-24 21:57:08,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) [2023-11-24 21:57:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2023-11-24 21:57:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:57:08,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:08,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:08,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:57:08,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:08,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1025797614, now seen corresponding path program 1 times [2023-11-24 21:57:08,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:08,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491717239] [2023-11-24 21:57:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:08,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491717239] [2023-11-24 21:57:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491717239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:08,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254473509] [2023-11-24 21:57:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:08,290 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) [2023-11-24 21:57:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:08,491 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2023-11-24 21:57:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:57:08,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 [2023-11-24 21:57:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:08,493 INFO L225 Difference]: With dead ends: 169 [2023-11-24 21:57:08,493 INFO L226 Difference]: Without dead ends: 169 [2023-11-24 21:57:08,493 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 [2023-11-24 21:57:08,494 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:08,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 146 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-24 21:57:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2023-11-24 21:57:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 130 states have (on average 1.523076923076923) internal successors, (198), 148 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) [2023-11-24 21:57:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 198 transitions. [2023-11-24 21:57:08,499 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 198 transitions. Word has length 22 [2023-11-24 21:57:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:08,500 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 198 transitions. [2023-11-24 21:57:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) [2023-11-24 21:57:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 198 transitions. [2023-11-24 21:57:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:57:08,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:08,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:57:08,501 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:08,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2051026185, now seen corresponding path program 1 times [2023-11-24 21:57:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:08,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691840376] [2023-11-24 21:57:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:08,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691840376] [2023-11-24 21:57:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691840376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:08,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:08,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:57:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29919921] [2023-11-24 21:57:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:57:08,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:57:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:08,737 INFO L87 Difference]: Start difference. First operand 149 states and 198 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 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) [2023-11-24 21:57:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:08,984 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2023-11-24 21:57:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:57:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 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 [2023-11-24 21:57:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:08,986 INFO L225 Difference]: With dead ends: 189 [2023-11-24 21:57:08,986 INFO L226 Difference]: Without dead ends: 189 [2023-11-24 21:57:08,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:57:08,987 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:08,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 169 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-24 21:57:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2023-11-24 21:57:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 139 states have (on average 1.5179856115107915) internal successors, (211), 157 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2023-11-24 21:57:08,992 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 24 [2023-11-24 21:57:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:08,993 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2023-11-24 21:57:08,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 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) [2023-11-24 21:57:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2023-11-24 21:57:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:57:08,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:08,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:57:08,994 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:08,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2051026186, now seen corresponding path program 1 times [2023-11-24 21:57:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:08,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875026798] [2023-11-24 21:57:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:08,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875026798] [2023-11-24 21:57:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875026798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:09,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:09,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:57:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167158369] [2023-11-24 21:57:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:57:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:57:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:57:09,364 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-11-24 21:57:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:09,547 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2023-11-24 21:57:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:57:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 [2023-11-24 21:57:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:09,549 INFO L225 Difference]: With dead ends: 168 [2023-11-24 21:57:09,550 INFO L226 Difference]: Without dead ends: 168 [2023-11-24 21:57:09,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:57:09,550 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 26 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:09,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 222 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-24 21:57:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2023-11-24 21:57:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 138 states have (on average 1.5072463768115942) internal successors, (208), 156 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2023-11-24 21:57:09,556 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 24 [2023-11-24 21:57:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:09,556 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2023-11-24 21:57:09,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-11-24 21:57:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2023-11-24 21:57:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:57:09,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:09,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:09,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:57:09,558 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:09,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash -842698756, now seen corresponding path program 1 times [2023-11-24 21:57:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:09,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741277946] [2023-11-24 21:57:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:09,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741277946] [2023-11-24 21:57:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741277946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:09,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:09,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:09,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685607761] [2023-11-24 21:57:09,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:09,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:09,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:09,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:09,642 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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) [2023-11-24 21:57:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:09,761 INFO L93 Difference]: Finished difference Result 184 states and 242 transitions. [2023-11-24 21:57:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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 [2023-11-24 21:57:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:09,763 INFO L225 Difference]: With dead ends: 184 [2023-11-24 21:57:09,763 INFO L226 Difference]: Without dead ends: 184 [2023-11-24 21:57:09,764 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 [2023-11-24 21:57:09,764 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:09,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 163 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-24 21:57:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 174. [2023-11-24 21:57:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 155 states have (on average 1.5612903225806452) internal successors, (242), 173 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2023-11-24 21:57:09,770 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 25 [2023-11-24 21:57:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:09,770 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2023-11-24 21:57:09,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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) [2023-11-24 21:57:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2023-11-24 21:57:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:57:09,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:09,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:09,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:57:09,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:09,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash -754606682, now seen corresponding path program 1 times [2023-11-24 21:57:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221455848] [2023-11-24 21:57:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221455848] [2023-11-24 21:57:09,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221455848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603753334] [2023-11-24 21:57:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:09,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:09,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:09,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:57:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:10,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:57:10,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:10,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603753334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:10,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:10,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-24 21:57:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439744852] [2023-11-24 21:57:10,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:10,110 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand has 5 states, 5 states have (on average 6.4) 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) [2023-11-24 21:57:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:10,171 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2023-11-24 21:57:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:57:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) 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 28 [2023-11-24 21:57:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:10,173 INFO L225 Difference]: With dead ends: 226 [2023-11-24 21:57:10,173 INFO L226 Difference]: Without dead ends: 226 [2023-11-24 21:57:10,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:10,174 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:10,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-24 21:57:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 210. [2023-11-24 21:57:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 191 states have (on average 1.581151832460733) internal successors, (302), 209 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 302 transitions. [2023-11-24 21:57:10,182 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 302 transitions. Word has length 28 [2023-11-24 21:57:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:10,182 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 302 transitions. [2023-11-24 21:57:10,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) 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) [2023-11-24 21:57:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 302 transitions. [2023-11-24 21:57:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:57:10,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:10,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:10,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:10,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:10,389 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:10,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1917970929, now seen corresponding path program 1 times [2023-11-24 21:57:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:10,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265289367] [2023-11-24 21:57:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:10,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265289367] [2023-11-24 21:57:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265289367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196263106] [2023-11-24 21:57:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:10,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:10,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:10,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:57:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:10,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:57:10,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:10,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:57:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:10,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:10,862 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_48| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_48| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_48|) 0)))) is different from false [2023-11-24 21:57:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-24 21:57:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196263106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:10,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 6 [2023-11-24 21:57:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257686386] [2023-11-24 21:57:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:57:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:57:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2023-11-24 21:57:10,881 INFO L87 Difference]: Start difference. First operand 210 states and 302 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:11,121 INFO L93 Difference]: Finished difference Result 215 states and 306 transitions. [2023-11-24 21:57:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:57:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2023-11-24 21:57:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:11,123 INFO L225 Difference]: With dead ends: 215 [2023-11-24 21:57:11,123 INFO L226 Difference]: Without dead ends: 205 [2023-11-24 21:57:11,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-11-24 21:57:11,124 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 232 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2023-11-24 21:57:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-24 21:57:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-24 21:57:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 186 states have (on average 1.5913978494623655) internal successors, (296), 204 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 296 transitions. [2023-11-24 21:57:11,131 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 296 transitions. Word has length 29 [2023-11-24 21:57:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:11,132 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 296 transitions. [2023-11-24 21:57:11,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 296 transitions. [2023-11-24 21:57:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:57:11,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:11,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:11,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:11,334 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:11,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:11,334 INFO L85 PathProgramCache]: Analyzing trace with hash 196868094, now seen corresponding path program 1 times [2023-11-24 21:57:11,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:11,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800546519] [2023-11-24 21:57:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:11,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:11,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:11,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492719814] [2023-11-24 21:57:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:11,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:11,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:57:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:11,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:57:11,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:11,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:11,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:11,651 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:57:11,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:57:11,738 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-24 21:57:11,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-24 21:57:11,798 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-24 21:57:11,798 INFO L378 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 36 treesize of output 16 [2023-11-24 21:57:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:11,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800546519] [2023-11-24 21:57:12,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492719814] [2023-11-24 21:57:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492719814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:12,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:57:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-24 21:57:12,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412687201] [2023-11-24 21:57:12,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:12,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:57:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:57:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:57:12,033 INFO L87 Difference]: Start difference. First operand 205 states and 296 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:12,437 INFO L93 Difference]: Finished difference Result 204 states and 294 transitions. [2023-11-24 21:57:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:57:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2023-11-24 21:57:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:12,439 INFO L225 Difference]: With dead ends: 204 [2023-11-24 21:57:12,439 INFO L226 Difference]: Without dead ends: 204 [2023-11-24 21:57:12,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:57:12,440 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:12,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 328 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:57:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-24 21:57:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-24 21:57:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 186 states have (on average 1.5806451612903225) internal successors, (294), 203 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2023-11-24 21:57:12,446 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 29 [2023-11-24 21:57:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:12,446 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2023-11-24 21:57:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2023-11-24 21:57:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:57:12,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:12,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:12,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:12,648 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:12,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 196868095, now seen corresponding path program 1 times [2023-11-24 21:57:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:12,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761072401] [2023-11-24 21:57:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:12,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:12,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865551862] [2023-11-24 21:57:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:12,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:12,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:57:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:12,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 21:57:12,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:12,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:57:12,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:12,962 INFO L378 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 [2023-11-24 21:57:12,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:13,034 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:57:13,035 INFO L378 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 15 treesize of output 15 [2023-11-24 21:57:13,043 INFO L378 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 18 treesize of output 13 [2023-11-24 21:57:13,131 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-24 21:57:13,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-24 21:57:13,149 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-24 21:57:13,149 INFO L378 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 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:57:13,208 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-24 21:57:13,209 INFO L378 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 36 treesize of output 16 [2023-11-24 21:57:13,216 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-24 21:57:13,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:57:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:13,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761072401] [2023-11-24 21:57:13,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865551862] [2023-11-24 21:57:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865551862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:13,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:57:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-24 21:57:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879909931] [2023-11-24 21:57:13,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:13,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:57:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:57:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:57:13,635 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:14,388 INFO L93 Difference]: Finished difference Result 213 states and 302 transitions. [2023-11-24 21:57:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:57:14,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2023-11-24 21:57:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:14,391 INFO L225 Difference]: With dead ends: 213 [2023-11-24 21:57:14,391 INFO L226 Difference]: Without dead ends: 213 [2023-11-24 21:57:14,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:57:14,392 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 13 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:14,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 403 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:57:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-24 21:57:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 193. [2023-11-24 21:57:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 192 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 282 transitions. [2023-11-24 21:57:14,398 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 282 transitions. Word has length 29 [2023-11-24 21:57:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:14,398 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 282 transitions. [2023-11-24 21:57:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 282 transitions. [2023-11-24 21:57:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 21:57:14,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:14,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 21:57:14,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:14,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:14,613 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:14,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 179683623, now seen corresponding path program 1 times [2023-11-24 21:57:14,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:14,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319511400] [2023-11-24 21:57:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319511400] [2023-11-24 21:57:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319511400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324509080] [2023-11-24 21:57:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:14,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:14,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:57:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:14,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:57:14,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:14,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:15,018 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:57:15,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-24 21:57:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:15,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324509080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:15,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-11-24 21:57:15,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294258357] [2023-11-24 21:57:15,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:57:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:57:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:15,199 INFO L87 Difference]: Start difference. First operand 193 states and 282 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:15,339 INFO L93 Difference]: Finished difference Result 212 states and 299 transitions. [2023-11-24 21:57:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:57:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2023-11-24 21:57:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:15,341 INFO L225 Difference]: With dead ends: 212 [2023-11-24 21:57:15,342 INFO L226 Difference]: Without dead ends: 212 [2023-11-24 21:57:15,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:57:15,342 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 139 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:15,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 131 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-24 21:57:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 192. [2023-11-24 21:57:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 176 states have (on average 1.5909090909090908) internal successors, (280), 191 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 280 transitions. [2023-11-24 21:57:15,348 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 280 transitions. Word has length 31 [2023-11-24 21:57:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:15,348 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 280 transitions. [2023-11-24 21:57:15,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 280 transitions. [2023-11-24 21:57:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 21:57:15,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:15,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 21:57:15,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:15,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:15,555 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:15,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 179683624, now seen corresponding path program 1 times [2023-11-24 21:57:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:15,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291785176] [2023-11-24 21:57:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:15,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291785176] [2023-11-24 21:57:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291785176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247016446] [2023-11-24 21:57:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:15,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:15,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:15,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:15,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:57:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:15,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:57:15,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:15,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:57:16,099 INFO L378 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 16 treesize of output 11 [2023-11-24 21:57:16,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:16,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:57:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:16,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:16,486 INFO L378 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 49 treesize of output 45 [2023-11-24 21:57:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:16,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247016446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:16,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:16,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-11-24 21:57:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677170940] [2023-11-24 21:57:16,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:57:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:57:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:57:16,537 INFO L87 Difference]: Start difference. First operand 192 states and 280 transitions. Second operand has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:16,806 INFO L93 Difference]: Finished difference Result 211 states and 297 transitions. [2023-11-24 21:57:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-24 21:57:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:16,808 INFO L225 Difference]: With dead ends: 211 [2023-11-24 21:57:16,808 INFO L226 Difference]: Without dead ends: 211 [2023-11-24 21:57:16,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:57:16,809 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:16,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 192 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-24 21:57:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 191. [2023-11-24 21:57:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 176 states have (on average 1.5795454545454546) internal successors, (278), 190 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 278 transitions. [2023-11-24 21:57:16,815 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 278 transitions. Word has length 31 [2023-11-24 21:57:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:16,816 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 278 transitions. [2023-11-24 21:57:16,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.909090909090909) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 278 transitions. [2023-11-24 21:57:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:57:16,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:16,817 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] [2023-11-24 21:57:16,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:17,017 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:17,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -763085952, now seen corresponding path program 1 times [2023-11-24 21:57:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740614307] [2023-11-24 21:57:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:17,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799780767] [2023-11-24 21:57:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:17,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:17,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:17,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:57:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:17,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:57:17,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:17,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:17,286 INFO L378 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 [2023-11-24 21:57:17,309 INFO L378 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 [2023-11-24 21:57:17,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-11-24 21:57:17,398 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:57:17,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-24 21:57:17,417 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:17,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:57:17,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 30 [2023-11-24 21:57:17,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 10 [2023-11-24 21:57:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:17,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:17,935 INFO L378 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 49 treesize of output 45 [2023-11-24 21:57:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740614307] [2023-11-24 21:57:17,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799780767] [2023-11-24 21:57:17,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799780767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:17,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:57:17,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2023-11-24 21:57:17,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729680510] [2023-11-24 21:57:17,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:17,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:57:17,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:57:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:57:17,990 INFO L87 Difference]: Start difference. First operand 191 states and 278 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:18,337 INFO L93 Difference]: Finished difference Result 210 states and 298 transitions. [2023-11-24 21:57:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:57:18,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2023-11-24 21:57:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:18,339 INFO L225 Difference]: With dead ends: 210 [2023-11-24 21:57:18,339 INFO L226 Difference]: Without dead ends: 210 [2023-11-24 21:57:18,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:57:18,340 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:18,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 286 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-24 21:57:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 197. [2023-11-24 21:57:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 182 states have (on average 1.565934065934066) internal successors, (285), 196 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 285 transitions. [2023-11-24 21:57:18,347 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 285 transitions. Word has length 32 [2023-11-24 21:57:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:18,347 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 285 transitions. [2023-11-24 21:57:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 285 transitions. [2023-11-24 21:57:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:57:18,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:18,348 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] [2023-11-24 21:57:18,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:18,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:57:18,549 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:18,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:18,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2114141091, now seen corresponding path program 1 times [2023-11-24 21:57:18,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:18,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887077971] [2023-11-24 21:57:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:18,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:18,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814098674] [2023-11-24 21:57:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:18,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:18,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:18,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:57:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:18,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:57:18,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:57:18,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:18,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887077971] [2023-11-24 21:57:18,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814098674] [2023-11-24 21:57:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814098674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:18,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:57:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013794032] [2023-11-24 21:57:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:57:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:57:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:57:18,876 INFO L87 Difference]: Start difference. First operand 197 states and 285 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 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) [2023-11-24 21:57:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:19,007 INFO L93 Difference]: Finished difference Result 209 states and 286 transitions. [2023-11-24 21:57:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:19,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 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 33 [2023-11-24 21:57:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:19,009 INFO L225 Difference]: With dead ends: 209 [2023-11-24 21:57:19,010 INFO L226 Difference]: Without dead ends: 209 [2023-11-24 21:57:19,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:19,010 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-24 21:57:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2023-11-24 21:57:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 182 states have (on average 1.554945054945055) internal successors, (283), 196 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 283 transitions. [2023-11-24 21:57:19,017 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 283 transitions. Word has length 33 [2023-11-24 21:57:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:19,018 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 283 transitions. [2023-11-24 21:57:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 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) [2023-11-24 21:57:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 283 transitions. [2023-11-24 21:57:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:57:19,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:19,019 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] [2023-11-24 21:57:19,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:57:19,225 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:19,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash 170112562, now seen corresponding path program 1 times [2023-11-24 21:57:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448359226] [2023-11-24 21:57:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:19,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:19,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238816004] [2023-11-24 21:57:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:19,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:19,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:19,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:57:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:19,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:57:19,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:57:19,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:19,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448359226] [2023-11-24 21:57:19,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238816004] [2023-11-24 21:57:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238816004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:19,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:19,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:19,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772035463] [2023-11-24 21:57:19,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:19,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:19,509 INFO L87 Difference]: Start difference. First operand 197 states and 283 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:19,589 INFO L93 Difference]: Finished difference Result 205 states and 279 transitions. [2023-11-24 21:57:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:57:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-24 21:57:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:19,591 INFO L225 Difference]: With dead ends: 205 [2023-11-24 21:57:19,591 INFO L226 Difference]: Without dead ends: 205 [2023-11-24 21:57:19,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:57:19,592 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:19,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-24 21:57:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 179. [2023-11-24 21:57:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 164 states have (on average 1.5) internal successors, (246), 178 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) [2023-11-24 21:57:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 246 transitions. [2023-11-24 21:57:19,599 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 246 transitions. Word has length 35 [2023-11-24 21:57:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:19,599 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 246 transitions. [2023-11-24 21:57:19,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 246 transitions. [2023-11-24 21:57:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:57:19,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:19,614 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] [2023-11-24 21:57:19,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:19,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:57:19,820 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:19,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 170112602, now seen corresponding path program 1 times [2023-11-24 21:57:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674717233] [2023-11-24 21:57:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:19,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:19,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907196375] [2023-11-24 21:57:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:19,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:19,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:19,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:19,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:57:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:20,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:57:20,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:20,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:20,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:20,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:57:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:20,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674717233] [2023-11-24 21:57:20,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907196375] [2023-11-24 21:57:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907196375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:20,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:57:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19687684] [2023-11-24 21:57:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:57:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:57:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:57:20,204 INFO L87 Difference]: Start difference. First operand 179 states and 246 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:20,508 INFO L93 Difference]: Finished difference Result 241 states and 322 transitions. [2023-11-24 21:57:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:57:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2023-11-24 21:57:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:20,510 INFO L225 Difference]: With dead ends: 241 [2023-11-24 21:57:20,510 INFO L226 Difference]: Without dead ends: 241 [2023-11-24 21:57:20,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:57:20,511 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:20,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 157 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-24 21:57:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 186. [2023-11-24 21:57:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 185 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 257 transitions. [2023-11-24 21:57:20,517 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 257 transitions. Word has length 35 [2023-11-24 21:57:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:20,517 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 257 transitions. [2023-11-24 21:57:20,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 257 transitions. [2023-11-24 21:57:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:57:20,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:20,518 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] [2023-11-24 21:57:20,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-24 21:57:20,725 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:20,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 170112603, now seen corresponding path program 1 times [2023-11-24 21:57:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738549047] [2023-11-24 21:57:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:20,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:20,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826406092] [2023-11-24 21:57:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:20,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:20,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:20,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:57:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:20,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:57:20,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:21,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:21,060 INFO L378 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 [2023-11-24 21:57:21,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:57:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:21,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738549047] [2023-11-24 21:57:21,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826406092] [2023-11-24 21:57:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826406092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:21,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:57:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837346409] [2023-11-24 21:57:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:21,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:57:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:57:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:57:21,218 INFO L87 Difference]: Start difference. First operand 186 states and 257 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:21,591 INFO L93 Difference]: Finished difference Result 230 states and 307 transitions. [2023-11-24 21:57:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:57:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2023-11-24 21:57:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:21,593 INFO L225 Difference]: With dead ends: 230 [2023-11-24 21:57:21,593 INFO L226 Difference]: Without dead ends: 230 [2023-11-24 21:57:21,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:57:21,594 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 59 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:21,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 246 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:57:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-24 21:57:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 186. [2023-11-24 21:57:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 171 states have (on average 1.4912280701754386) internal successors, (255), 185 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2023-11-24 21:57:21,600 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 35 [2023-11-24 21:57:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:21,600 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2023-11-24 21:57:21,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2023-11-24 21:57:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:57:21,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:21,601 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] [2023-11-24 21:57:21,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:21,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:21,802 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:21,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:21,803 INFO L85 PathProgramCache]: Analyzing trace with hash 978524868, now seen corresponding path program 1 times [2023-11-24 21:57:21,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:21,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508983714] [2023-11-24 21:57:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:21,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:21,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613860651] [2023-11-24 21:57:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:21,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:21,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:57:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:22,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:57:22,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:57:22,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508983714] [2023-11-24 21:57:22,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613860651] [2023-11-24 21:57:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613860651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:22,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:22,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085872085] [2023-11-24 21:57:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:22,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:22,129 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) 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) [2023-11-24 21:57:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:22,200 INFO L93 Difference]: Finished difference Result 187 states and 249 transitions. [2023-11-24 21:57:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) 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 36 [2023-11-24 21:57:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:22,202 INFO L225 Difference]: With dead ends: 187 [2023-11-24 21:57:22,202 INFO L226 Difference]: Without dead ends: 187 [2023-11-24 21:57:22,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:22,203 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:22,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 112 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:57:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-24 21:57:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2023-11-24 21:57:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.4385964912280702) internal successors, (246), 183 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) [2023-11-24 21:57:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 246 transitions. [2023-11-24 21:57:22,208 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 246 transitions. Word has length 36 [2023-11-24 21:57:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:22,209 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 246 transitions. [2023-11-24 21:57:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) 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) [2023-11-24 21:57:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 246 transitions. [2023-11-24 21:57:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:57:22,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:22,210 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] [2023-11-24 21:57:22,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:22,417 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:22,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 978524869, now seen corresponding path program 1 times [2023-11-24 21:57:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966058853] [2023-11-24 21:57:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:22,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:22,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411568262] [2023-11-24 21:57:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:22,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:22,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:22,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:57:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:22,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:57:22,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:22,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:57:22,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:22,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:22,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:57:22,912 INFO L378 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 [2023-11-24 21:57:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:22,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966058853] [2023-11-24 21:57:22,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411568262] [2023-11-24 21:57:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411568262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:22,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:22,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:57:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460839185] [2023-11-24 21:57:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:57:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:57:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:57:22,966 INFO L87 Difference]: Start difference. First operand 184 states and 246 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:23,483 INFO L93 Difference]: Finished difference Result 241 states and 313 transitions. [2023-11-24 21:57:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:57:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-24 21:57:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:23,485 INFO L225 Difference]: With dead ends: 241 [2023-11-24 21:57:23,485 INFO L226 Difference]: Without dead ends: 241 [2023-11-24 21:57:23,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:57:23,487 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:23,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 270 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:57:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-24 21:57:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 190. [2023-11-24 21:57:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 177 states have (on average 1.4350282485875707) internal successors, (254), 189 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2023-11-24 21:57:23,492 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 36 [2023-11-24 21:57:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:23,492 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2023-11-24 21:57:23,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2023-11-24 21:57:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 21:57:23,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:23,493 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] [2023-11-24 21:57:23,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-24 21:57:23,702 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:23,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1291415916, now seen corresponding path program 1 times [2023-11-24 21:57:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512160298] [2023-11-24 21:57:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:23,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:23,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917190376] [2023-11-24 21:57:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:23,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:23,731 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:23,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:57:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:23,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:57:23,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:24,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:24,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:57:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:24,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:57:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512160298] [2023-11-24 21:57:24,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917190376] [2023-11-24 21:57:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917190376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:24,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:24,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:57:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382853311] [2023-11-24 21:57:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:57:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:57:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:57:24,182 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:24,595 INFO L93 Difference]: Finished difference Result 240 states and 311 transitions. [2023-11-24 21:57:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:57:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2023-11-24 21:57:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:24,597 INFO L225 Difference]: With dead ends: 240 [2023-11-24 21:57:24,597 INFO L226 Difference]: Without dead ends: 240 [2023-11-24 21:57:24,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:57:24,598 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:24,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 264 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:57:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-24 21:57:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2023-11-24 21:57:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 179 states have (on average 1.4301675977653632) internal successors, (256), 191 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 256 transitions. [2023-11-24 21:57:24,604 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 256 transitions. Word has length 39 [2023-11-24 21:57:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:24,604 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 256 transitions. [2023-11-24 21:57:24,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 256 transitions. [2023-11-24 21:57:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:57:24,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:24,605 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] [2023-11-24 21:57:24,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-24 21:57:24,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-24 21:57:24,811 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:24,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash -976177314, now seen corresponding path program 1 times [2023-11-24 21:57:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335248968] [2023-11-24 21:57:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:24,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449964231] [2023-11-24 21:57:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:24,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:24,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:24,836 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:24,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 21:57:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:25,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 21:57:25,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:25,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:25,143 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:25,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:57:25,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:57:25,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:25,235 INFO L378 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 16 treesize of output 16 [2023-11-24 21:57:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:25,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:25,334 INFO L378 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 11 treesize of output 9 [2023-11-24 21:57:25,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-24 21:57:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:25,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335248968] [2023-11-24 21:57:25,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449964231] [2023-11-24 21:57:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449964231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:57:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2023-11-24 21:57:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874330163] [2023-11-24 21:57:25,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:25,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:57:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:57:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:57:25,458 INFO L87 Difference]: Start difference. First operand 192 states and 256 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:25,817 INFO L93 Difference]: Finished difference Result 240 states and 309 transitions. [2023-11-24 21:57:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:57:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-24 21:57:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:25,820 INFO L225 Difference]: With dead ends: 240 [2023-11-24 21:57:25,820 INFO L226 Difference]: Without dead ends: 238 [2023-11-24 21:57:25,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:57:25,821 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 50 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:25,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 342 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:57:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-24 21:57:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 192. [2023-11-24 21:57:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 179 states have (on average 1.4189944134078212) internal successors, (254), 191 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 254 transitions. [2023-11-24 21:57:25,856 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 254 transitions. Word has length 40 [2023-11-24 21:57:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:25,856 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 254 transitions. [2023-11-24 21:57:25,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 254 transitions. [2023-11-24 21:57:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:57:25,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:25,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:25,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-24 21:57:26,064 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:26,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1379433479, now seen corresponding path program 1 times [2023-11-24 21:57:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486390524] [2023-11-24 21:57:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:26,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:26,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890451880] [2023-11-24 21:57:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:26,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:26,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 21:57:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:26,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-24 21:57:26,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:26,365 INFO L378 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 [2023-11-24 21:57:26,381 INFO L378 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 19 treesize of output 18 [2023-11-24 21:57:26,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:26,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-24 21:57:26,510 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:57:26,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-24 21:57:26,637 INFO L349 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2023-11-24 21:57:26,638 INFO L378 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 3 case distinctions, treesize of input 38 treesize of output 47 [2023-11-24 21:57:26,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:57:26,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-24 21:57:26,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-24 21:57:26,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:26,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2023-11-24 21:57:26,766 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-24 21:57:26,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 45 [2023-11-24 21:57:26,782 INFO L378 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 [2023-11-24 21:57:27,010 INFO L378 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 7 treesize of output 3 [2023-11-24 21:57:27,138 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:27,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 17 [2023-11-24 21:57:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:27,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:39,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:39,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 244 [2023-11-24 21:57:45,059 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse19 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse2 (select .cse19 |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse5 (store .cse19 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4) |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8))) (and (or (forall ((v_ArrVal_2517 (Array Int Int)) (v_prenex_4 Int) (|ULTIMATE.start_main_~y~0#1.base| Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_2514 Int)) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse5 .cse6 v_ArrVal_2514)))) (let ((.cse0 (select (select (let ((.cse4 (store (select .cse3 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| |ULTIMATE.start_main_~y~0#1.base| .cse4) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse3 |ULTIMATE.start_main_~y~0#1.base| .cse4) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0))) (or (= .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (= .cse0 (select (select (let ((.cse1 (store (select .cse3 v_prenex_4) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| v_prenex_4 .cse1) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse3 v_prenex_4 .cse1) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_prenex_4))) v_prenex_4) 0)))))) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0)) (forall ((v_prenex_4 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_2514 Int)) (let ((.cse9 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse5 .cse6 v_ArrVal_2514)))) (let ((.cse7 (select (select (let ((.cse10 (store (select .cse9 v_prenex_4) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| v_prenex_4 .cse10) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse9 v_prenex_4 .cse10) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_prenex_4))) v_prenex_4) 0))) (or (= .cse7 |c_ULTIMATE.start_main_~x~0#1.base|) (= v_prenex_4 |c_ULTIMATE.start_main_~x~0#1.base|) (forall ((v_ArrVal_2517 (Array Int Int)) (|ULTIMATE.start_main_~y~0#1.base| Int)) (= (select (select (let ((.cse8 (store (select .cse9 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| |ULTIMATE.start_main_~y~0#1.base| .cse8) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse9 |ULTIMATE.start_main_~y~0#1.base| .cse8) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) .cse7)))))) (forall ((v_ArrVal_2514 Int)) (let ((.cse12 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse5 .cse6 v_ArrVal_2514)))) (or (forall ((v_prenex_4 Int) (v_prenex_3 (Array Int Int))) (= (select (select (let ((.cse11 (store (select .cse12 v_prenex_4) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| v_prenex_4 .cse11) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse12 v_prenex_4 .cse11) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_prenex_4))) v_prenex_4) 0) |c_ULTIMATE.start_main_~x~0#1.base|)) (forall ((v_ArrVal_2517 (Array Int Int)) (|ULTIMATE.start_main_~y~0#1.base| Int)) (= (select (select (let ((.cse13 (store (select .cse12 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| |ULTIMATE.start_main_~y~0#1.base| .cse13) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse12 |ULTIMATE.start_main_~y~0#1.base| .cse13) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.base|))))) (forall ((v_prenex_4 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_2514 Int)) (let ((.cse17 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse5 .cse6 v_ArrVal_2514)))) (let ((.cse14 (select (select (let ((.cse18 (store (select .cse17 v_prenex_4) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| v_prenex_4 .cse18) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse17 v_prenex_4 .cse18) .cse2 v_prenex_3) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_prenex_4))) v_prenex_4) 0))) (or (= .cse14 |c_ULTIMATE.start_main_~x~0#1.base|) (forall ((v_ArrVal_2517 (Array Int Int)) (|ULTIMATE.start_main_~y~0#1.base| Int)) (let ((.cse15 (select (select (let ((.cse16 (store (select .cse17 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) (store (store (store |c_#memory_$Pointer$#1.base| |ULTIMATE.start_main_~y~0#1.base| .cse16) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base| (store (select (store (store .cse17 |ULTIMATE.start_main_~y~0#1.base| .cse16) .cse2 v_ArrVal_2517) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0))) (or (= .cse15 |c_ULTIMATE.start_main_~x~0#1.base|) (= .cse15 .cse14))))))))))) is different from false [2023-11-24 21:57:45,112 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:45,114 INFO L378 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 14 treesize of output 12 [2023-11-24 21:57:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:45,118 INFO L378 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 15 treesize of output 11 [2023-11-24 21:57:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:45,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:45,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486390524] [2023-11-24 21:57:45,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:57:45,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890451880] [2023-11-24 21:57:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890451880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:45,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:57:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-24 21:57:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405542607] [2023-11-24 21:57:45,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:57:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:57:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=648, Unknown=51, NotChecked=54, Total=870 [2023-11-24 21:57:45,137 INFO L87 Difference]: Start difference. First operand 192 states and 254 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:53,800 INFO L93 Difference]: Finished difference Result 297 states and 382 transitions. [2023-11-24 21:57:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:57:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-24 21:57:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:53,806 INFO L225 Difference]: With dead ends: 297 [2023-11-24 21:57:53,806 INFO L226 Difference]: Without dead ends: 297 [2023-11-24 21:57:53,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=211, Invalid=1376, Unknown=57, NotChecked=78, Total=1722 [2023-11-24 21:57:53,808 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 94 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:53,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 639 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1028 Invalid, 0 Unknown, 112 Unchecked, 6.9s Time] [2023-11-24 21:57:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-24 21:57:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 246. [2023-11-24 21:57:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 233 states have (on average 1.386266094420601) internal successors, (323), 245 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 323 transitions. [2023-11-24 21:57:53,815 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 323 transitions. Word has length 40 [2023-11-24 21:57:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 323 transitions. [2023-11-24 21:57:53,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 323 transitions. [2023-11-24 21:57:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:57:53,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:53,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:53,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-24 21:57:54,024 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-24 21:57:54,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1379433480, now seen corresponding path program 1 times [2023-11-24 21:57:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:54,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501746383] [2023-11-24 21:57:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:54,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:57:54,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390092976] [2023-11-24 21:57:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:54,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:54,077 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:54,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ed8651d-6c99-41d7-9ed8-ce56192fd0ac/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 21:57:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:54,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 21:57:54,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:54,385 INFO L378 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 [2023-11-24 21:57:54,390 INFO L378 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 [2023-11-24 21:57:54,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:57:54,418 INFO L378 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 19 treesize of output 18 [2023-11-24 21:57:54,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:57:54,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-24 21:57:54,622 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:57:54,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:57:54,653 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:57:54,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-24 21:57:54,838 INFO L349 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2023-11-24 21:57:54,838 INFO L378 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 3 case distinctions, treesize of input 54 treesize of output 59 [2023-11-24 21:57:54,872 INFO L349 Elim1Store]: treesize reduction 14, result has 56.3 percent of original size [2023-11-24 21:57:54,872 INFO L378 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 27 treesize of output 37 [2023-11-24 21:57:54,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:57:54,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-24 21:57:54,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-24 21:57:54,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-24 21:57:55,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-24 21:57:55,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-24 21:57:55,089 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-24 21:57:55,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 45