./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl --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 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:19:49,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:19:49,849 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:19:49,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:19:49,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:19:49,883 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:19:49,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:19:49,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:19:49,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:19:49,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:19:49,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:19:49,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:19:49,888 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:19:49,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:19:49,890 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:19:49,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:19:49,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:19:49,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:19:49,892 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:19:49,893 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:19:49,894 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:19:49,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:19:49,900 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:19:49,901 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:19:49,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:19:49,902 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:19:49,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:19:49,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:19:49,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:19:49,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:19:49,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:19:49,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:19:49,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:19:49,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:19:49,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:19:49,913 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:19:49,913 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:19:49,914 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:19:49,914 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_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a [2023-11-12 02:19:50,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:19:50,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:19:50,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:19:50,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:19:50,261 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:19:50,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/verifythis/lcp.c [2023-11-12 02:19:53,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:19:53,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:19:53,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/sv-benchmarks/c/verifythis/lcp.c [2023-11-12 02:19:53,665 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/data/b1f5372e7/434b08a2d5f1449187f80ef2272cffa2/FLAG76be34341 [2023-11-12 02:19:53,681 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/data/b1f5372e7/434b08a2d5f1449187f80ef2272cffa2 [2023-11-12 02:19:53,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:19:53,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:19:53,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:19:53,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:19:53,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:19:53,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:53,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d883f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53, skipping insertion in model container [2023-11-12 02:19:53,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:53,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:19:53,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:19:53,903 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:19:53,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:19:53,951 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:19:53,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53 WrapperNode [2023-11-12 02:19:53,952 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:19:53,953 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:19:53,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:19:53,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:19:53,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:53,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:53,997 INFO L138 Inliner]: procedures = 20, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 95 [2023-11-12 02:19:53,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:19:53,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:19:53,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:19:53,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:19:54,010 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:19:54,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:19:54,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:19:54,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:19:54,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (1/1) ... [2023-11-12 02:19:54,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:19:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:54,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:19:54,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:19:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:19:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:19:54,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:19:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:19:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:19:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:19:54,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:19:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:19:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:19:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:19:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:19:54,219 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:19:54,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:19:54,524 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:19:54,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:19:54,539 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:19:54,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:54 BoogieIcfgContainer [2023-11-12 02:19:54,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:19:54,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:19:54,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:19:54,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:19:54,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:19:53" (1/3) ... [2023-11-12 02:19:54,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2340478f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:19:54, skipping insertion in model container [2023-11-12 02:19:54,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:53" (2/3) ... [2023-11-12 02:19:54,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2340478f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:19:54, skipping insertion in model container [2023-11-12 02:19:54,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:54" (3/3) ... [2023-11-12 02:19:54,555 INFO L112 eAbstractionObserver]: Analyzing ICFG lcp.c [2023-11-12 02:19:54,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:19:54,577 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-12 02:19:54,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:19:54,635 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;@68864611, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:19:54,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-12 02:19:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 51 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:19:54,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:54,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:54,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:54,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash 408123820, now seen corresponding path program 1 times [2023-11-12 02:19:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:54,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106317878] [2023-11-12 02:19:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:54,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:19:54,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106317878] [2023-11-12 02:19:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106317878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:54,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:19:54,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:19:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954417158] [2023-11-12 02:19:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:54,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:19:54,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:19:54,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:19:54,965 INFO L87 Difference]: Start difference. First operand has 59 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 51 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:54,985 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-11-12 02:19:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:19:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-12 02:19:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:54,995 INFO L225 Difference]: With dead ends: 58 [2023-11-12 02:19:54,996 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 02:19:54,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:19:55,002 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:55,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:19:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 02:19:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-12 02:19:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.59375) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-11-12 02:19:55,045 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 18 [2023-11-12 02:19:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:55,046 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-11-12 02:19:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-11-12 02:19:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:19:55,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:55,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:19:55,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:55,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1172013932, now seen corresponding path program 1 times [2023-11-12 02:19:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726180718] [2023-11-12 02:19:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:55,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:19:55,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726180718] [2023-11-12 02:19:55,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726180718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:55,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:19:55,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:19:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883070922] [2023-11-12 02:19:55,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:55,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:19:55,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:19:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:19:55,373 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:55,580 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-12 02:19:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:19:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-12 02:19:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:55,585 INFO L225 Difference]: With dead ends: 53 [2023-11-12 02:19:55,585 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 02:19:55,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:19:55,587 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:19:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 02:19:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-12 02:19:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.5) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-12 02:19:55,604 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 18 [2023-11-12 02:19:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:55,608 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-12 02:19:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-12 02:19:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:19:55,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:55,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:19:55,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:55,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1172013933, now seen corresponding path program 1 times [2023-11-12 02:19:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:55,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038638730] [2023-11-12 02:19:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:19:56,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:56,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038638730] [2023-11-12 02:19:56,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038638730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:56,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:19:56,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:19:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380873639] [2023-11-12 02:19:56,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:19:56,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:19:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:19:56,609 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:57,162 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2023-11-12 02:19:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:19:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-12 02:19:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:57,165 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:19:57,165 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 02:19:57,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:19:57,171 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:57,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 153 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:19:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 02:19:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2023-11-12 02:19:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.457142857142857) internal successors, (51), 47 states have internal predecessors, (51), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-11-12 02:19:57,179 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 18 [2023-11-12 02:19:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:57,180 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-11-12 02:19:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-11-12 02:19:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 02:19:57,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:57,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:19:57,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:57,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1972693515, now seen corresponding path program 1 times [2023-11-12 02:19:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:57,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711966934] [2023-11-12 02:19:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:57,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:19:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711966934] [2023-11-12 02:19:57,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711966934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:57,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:19:57,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 02:19:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421834524] [2023-11-12 02:19:57,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:19:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:19:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:19:57,833 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:58,360 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-11-12 02:19:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:19:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-12 02:19:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:58,362 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:19:58,362 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:19:58,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:19:58,364 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:58,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 145 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:19:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:19:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2023-11-12 02:19:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 48 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-12 02:19:58,373 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 19 [2023-11-12 02:19:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:58,373 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-12 02:19:58,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:19:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-12 02:19:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 02:19:58,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:58,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:58,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:19:58,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:58,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1686611008, now seen corresponding path program 1 times [2023-11-12 02:19:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256934732] [2023-11-12 02:19:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:19:58,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:58,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256934732] [2023-11-12 02:19:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256934732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:19:58,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:19:58,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:19:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484840307] [2023-11-12 02:19:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:19:58,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:19:58,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:19:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:19:58,410 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:19:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:19:58,422 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-12 02:19:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:19:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-12 02:19:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:19:58,424 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:19:58,424 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:19:58,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:19:58,426 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:19:58,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:19:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:19:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-12 02:19:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 49 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:19:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-12 02:19:58,433 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 21 [2023-11-12 02:19:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:19:58,434 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-12 02:19:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:19:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-12 02:19:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 02:19:58,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:19:58,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:19:58,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:19:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1167809151, now seen corresponding path program 1 times [2023-11-12 02:19:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418716279] [2023-11-12 02:19:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:19:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:19:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:19:58,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418716279] [2023-11-12 02:19:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418716279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344913461] [2023-11-12 02:19:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:58,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:58,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:58,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:19:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:59,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 02:19:59,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:59,247 INFO L351 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 10 treesize of output 9 [2023-11-12 02:20:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:01,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344913461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:03,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:03,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2023-11-12 02:20:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320563383] [2023-11-12 02:20:03,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:20:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:20:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=842, Unknown=2, NotChecked=0, Total=992 [2023-11-12 02:20:03,257 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:20:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:04,581 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2023-11-12 02:20:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:20:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-12 02:20:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:04,584 INFO L225 Difference]: With dead ends: 77 [2023-11-12 02:20:04,584 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 02:20:04,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=426, Invalid=1642, Unknown=2, NotChecked=0, Total=2070 [2023-11-12 02:20:04,586 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 343 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:04,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 234 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:20:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 02:20:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2023-11-12 02:20:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 48 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-12 02:20:04,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 24 [2023-11-12 02:20:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:04,594 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-12 02:20:04,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:20:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-12 02:20:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 02:20:04,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:04,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:04,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:04,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:04,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1842345273, now seen corresponding path program 1 times [2023-11-12 02:20:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:04,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568128253] [2023-11-12 02:20:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:04,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568128253] [2023-11-12 02:20:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568128253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149359944] [2023-11-12 02:20:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:05,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:05,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:20:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:05,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:20:05,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:05,575 INFO L351 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 [2023-11-12 02:20:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:06,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:06,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149359944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:06,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:06,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 30 [2023-11-12 02:20:06,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713002759] [2023-11-12 02:20:06,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:20:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:20:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:20:06,695 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:20:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:07,990 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-11-12 02:20:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:20:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-12 02:20:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:07,991 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:20:07,992 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 02:20:07,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:20:07,993 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 290 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:07,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 271 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:20:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 02:20:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-11-12 02:20:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.393939393939394) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-12 02:20:07,999 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 25 [2023-11-12 02:20:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:07,999 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-12 02:20:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:20:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-12 02:20:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:20:08,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:08,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:08,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:08,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:20:08,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:08,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1124652641, now seen corresponding path program 1 times [2023-11-12 02:20:08,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:08,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900027419] [2023-11-12 02:20:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:20:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:08,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:08,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900027419] [2023-11-12 02:20:08,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900027419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:08,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:08,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:20:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150219127] [2023-11-12 02:20:08,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:20:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:20:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:20:08,312 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:20:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:08,394 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-11-12 02:20:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-11-12 02:20:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:08,396 INFO L225 Difference]: With dead ends: 47 [2023-11-12 02:20:08,396 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 02:20:08,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:08,402 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 62 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:08,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 73 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 02:20:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-12 02:20:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-11-12 02:20:08,408 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2023-11-12 02:20:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:08,408 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-11-12 02:20:08,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:20:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-11-12 02:20:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:20:08,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:08,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:20:08,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:08,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:08,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1124652642, now seen corresponding path program 1 times [2023-11-12 02:20:08,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:08,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887725468] [2023-11-12 02:20:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:08,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:20:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887725468] [2023-11-12 02:20:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887725468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:08,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:20:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332985626] [2023-11-12 02:20:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:20:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:20:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:08,556 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:20:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:08,639 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-11-12 02:20:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:20:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-12 02:20:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:08,641 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:20:08,641 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 02:20:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:20:08,644 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:08,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 02:20:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-12 02:20:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-12 02:20:08,658 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 26 [2023-11-12 02:20:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:08,659 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-12 02:20:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:20:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-12 02:20:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 02:20:08,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:08,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:08,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:20:08,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:08,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash -103711884, now seen corresponding path program 1 times [2023-11-12 02:20:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:08,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121233818] [2023-11-12 02:20:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:09,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:09,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:09,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:09,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121233818] [2023-11-12 02:20:09,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121233818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:09,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169172889] [2023-11-12 02:20:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:09,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:09,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:09,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:20:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:09,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-12 02:20:09,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:09,305 INFO L351 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 [2023-11-12 02:20:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:20:09,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:10,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169172889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:10,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:10,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-11-12 02:20:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532432061] [2023-11-12 02:20:10,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:20:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:20:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:20:10,598 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 29 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:12,436 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2023-11-12 02:20:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:20:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2023-11-12 02:20:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:12,438 INFO L225 Difference]: With dead ends: 117 [2023-11-12 02:20:12,438 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 02:20:12,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2023-11-12 02:20:12,440 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 295 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:12,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 440 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:20:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 02:20:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2023-11-12 02:20:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:20:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-11-12 02:20:12,448 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 32 [2023-11-12 02:20:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:12,448 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-11-12 02:20:12,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-11-12 02:20:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:20:12,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:12,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:12,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:12,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:12,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1079898874, now seen corresponding path program 1 times [2023-11-12 02:20:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159334336] [2023-11-12 02:20:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:13,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159334336] [2023-11-12 02:20:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159334336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428189677] [2023-11-12 02:20:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:13,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:13,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:20:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:13,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:20:13,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:13,251 INFO L351 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 [2023-11-12 02:20:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:20:13,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:20:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428189677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:14,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-11-12 02:20:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126888825] [2023-11-12 02:20:14,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:20:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:20:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:20:14,426 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 29 states, 25 states have (on average 2.36) internal successors, (59), 28 states have internal predecessors, (59), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:16,234 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2023-11-12 02:20:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:20:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.36) internal successors, (59), 28 states have internal predecessors, (59), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2023-11-12 02:20:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:16,237 INFO L225 Difference]: With dead ends: 115 [2023-11-12 02:20:16,237 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 02:20:16,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=2003, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 02:20:16,239 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 283 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:16,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 418 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:20:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 02:20:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2023-11-12 02:20:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 65 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:20:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-11-12 02:20:16,256 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 33 [2023-11-12 02:20:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:16,257 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-11-12 02:20:16,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.36) internal successors, (59), 28 states have internal predecessors, (59), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:20:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-11-12 02:20:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:20:16,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:16,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-12 02:20:16,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:16,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:16,469 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:16,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 703166983, now seen corresponding path program 1 times [2023-11-12 02:20:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392974994] [2023-11-12 02:20:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:16,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:16,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:20:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:16,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392974994] [2023-11-12 02:20:16,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392974994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:16,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:16,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:20:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181086269] [2023-11-12 02:20:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:20:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:20:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:20:16,677 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:20:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:16,879 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2023-11-12 02:20:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:20:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-11-12 02:20:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:16,881 INFO L225 Difference]: With dead ends: 79 [2023-11-12 02:20:16,881 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 02:20:16,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:20:16,882 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:16,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 168 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 02:20:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-12 02:20:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:20:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-12 02:20:16,887 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 37 [2023-11-12 02:20:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:16,887 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-12 02:20:16,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:20:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-12 02:20:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:20:16,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:16,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-12 02:20:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:20:16,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -808678826, now seen corresponding path program 1 times [2023-11-12 02:20:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:16,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636353804] [2023-11-12 02:20:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:20:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:20:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636353804] [2023-11-12 02:20:17,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636353804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933673987] [2023-11-12 02:20:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:17,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:17,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:17,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:20:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:20:17,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:20:17,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:20:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933673987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:17,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-12 02:20:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098578782] [2023-11-12 02:20:17,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:20:17,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:20:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:20:17,720 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:17,883 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-11-12 02:20:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:20:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-11-12 02:20:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:17,884 INFO L225 Difference]: With dead ends: 102 [2023-11-12 02:20:17,885 INFO L226 Difference]: Without dead ends: 102 [2023-11-12 02:20:17,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:20:17,885 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:17,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 243 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-12 02:20:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2023-11-12 02:20:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 78 states have internal predecessors, (87), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:20:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2023-11-12 02:20:17,893 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 41 [2023-11-12 02:20:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:17,893 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2023-11-12 02:20:17,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2023-11-12 02:20:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:20:17,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:17,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-12 02:20:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:18,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:18,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash 249037366, now seen corresponding path program 1 times [2023-11-12 02:20:18,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:18,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038436010] [2023-11-12 02:20:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:20:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:20:18,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038436010] [2023-11-12 02:20:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038436010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:18,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810103800] [2023-11-12 02:20:18,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:18,178 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:18,212 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2023-11-12 02:20:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-11-12 02:20:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:18,213 INFO L225 Difference]: With dead ends: 91 [2023-11-12 02:20:18,213 INFO L226 Difference]: Without dead ends: 91 [2023-11-12 02:20:18,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:20:18,214 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:18,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:20:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-12 02:20:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-12 02:20:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 77 states have internal predecessors, (86), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:20:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-11-12 02:20:18,219 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 43 [2023-11-12 02:20:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:18,220 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-11-12 02:20:18,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-11-12 02:20:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:20:18,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:18,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:18,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:20:18,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:18,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 67998009, now seen corresponding path program 1 times [2023-11-12 02:20:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:18,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012176943] [2023-11-12 02:20:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:20:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:20:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:18,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:18,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012176943] [2023-11-12 02:20:18,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012176943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:18,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979646408] [2023-11-12 02:20:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:18,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:18,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:20:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:20:18,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:18,531 INFO L351 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 7 treesize of output 6 [2023-11-12 02:20:18,601 INFO L351 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 35 treesize of output 29 [2023-11-12 02:20:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:20:18,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:27,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979646408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:27,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:20:27,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 02:20:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856368793] [2023-11-12 02:20:27,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:20:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:20:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:20:27,880 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:20:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:28,044 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2023-11-12 02:20:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:20:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2023-11-12 02:20:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:28,045 INFO L225 Difference]: With dead ends: 70 [2023-11-12 02:20:28,046 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 02:20:28,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:20:28,047 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:28,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 179 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 02:20:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2023-11-12 02:20:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-11-12 02:20:28,057 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 44 [2023-11-12 02:20:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:28,057 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-11-12 02:20:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:20:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-11-12 02:20:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:20:28,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:28,059 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:28,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:20:28,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:28,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1708514024, now seen corresponding path program 2 times [2023-11-12 02:20:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243312389] [2023-11-12 02:20:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:29,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:29,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:20:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:20:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243312389] [2023-11-12 02:20:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243312389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734895363] [2023-11-12 02:20:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:20:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:29,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:20:29,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:20:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:29,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 02:20:29,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:29,180 INFO L351 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 [2023-11-12 02:20:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:29,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734895363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:30,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:30,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 30 [2023-11-12 02:20:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371398316] [2023-11-12 02:20:30,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:20:30,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:20:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:20:30,738 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 31 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 02:20:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:31,709 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-11-12 02:20:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:20:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-11-12 02:20:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:31,711 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:20:31,711 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:20:31,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:20:31,713 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:31,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 192 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:20:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:20:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-12 02:20:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:20:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-12 02:20:31,718 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 44 [2023-11-12 02:20:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:31,718 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-12 02:20:31,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 02:20:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-12 02:20:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:20:31,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:31,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:31,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:31,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:31,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1193256743, now seen corresponding path program 1 times [2023-11-12 02:20:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723591390] [2023-11-12 02:20:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:20:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:20:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:20:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:32,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723591390] [2023-11-12 02:20:32,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723591390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:32,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:32,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:20:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038711652] [2023-11-12 02:20:32,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:20:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:32,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:20:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:20:32,099 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:32,166 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-12 02:20:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:20:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-11-12 02:20:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:32,167 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:20:32,167 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 02:20:32,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:32,168 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:32,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:20:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 02:20:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-12 02:20:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:20:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2023-11-12 02:20:32,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 45 [2023-11-12 02:20:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2023-11-12 02:20:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:20:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2023-11-12 02:20:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:20:32,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:32,174 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:32,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:20:32,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-12 02:20:32,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1424327210, now seen corresponding path program 2 times [2023-11-12 02:20:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:32,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399094187] [2023-11-12 02:20:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:32,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:20:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:20:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:20:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:20:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:32,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399094187] [2023-11-12 02:20:32,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399094187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:32,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524806340] [2023-11-12 02:20:32,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:20:32,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:32,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:32,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:20:32,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:20:32,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:32,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 02:20:32,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:32,965 INFO L351 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 [2023-11-12 02:20:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:33,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:20:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524806340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:34,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 26 [2023-11-12 02:20:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730580216] [2023-11-12 02:20:34,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:20:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:20:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:20:34,237 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 27 states, 24 states have (on average 3.125) internal successors, (75), 27 states have internal predecessors, (75), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:20:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:34,641 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2023-11-12 02:20:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:20:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 27 states have internal predecessors, (75), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2023-11-12 02:20:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:34,642 INFO L225 Difference]: With dead ends: 45 [2023-11-12 02:20:34,642 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 02:20:34,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 02:20:34,644 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:34,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 103 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:20:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 02:20:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 02:20:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 02:20:34,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2023-11-12 02:20:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:34,646 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:20:34,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 27 states have internal predecessors, (75), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 02:20:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 02:20:34,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 02:20:34,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2023-11-12 02:20:34,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2023-11-12 02:20:34,651 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2023-11-12 02:20:34,651 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2023-11-12 02:20:34,651 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2023-11-12 02:20:34,651 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2023-11-12 02:20:34,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2023-11-12 02:20:34,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2023-11-12 02:20:34,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2023-11-12 02:20:34,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2023-11-12 02:20:34,652 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2023-11-12 02:20:34,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2023-11-12 02:20:34,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (4 of 17 remaining) [2023-11-12 02:20:34,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (3 of 17 remaining) [2023-11-12 02:20:34,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (2 of 17 remaining) [2023-11-12 02:20:34,653 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (1 of 17 remaining) [2023-11-12 02:20:34,654 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2023-11-12 02:20:34,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:34,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:20:34,863 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:34,866 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:20:34,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:20:34 BoogieIcfgContainer [2023-11-12 02:20:34,870 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:20:34,871 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:20:34,871 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:20:34,871 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:20:34,872 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:54" (3/4) ... [2023-11-12 02:20:34,874 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 02:20:34,879 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-11-12 02:20:34,879 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-12 02:20:34,886 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2023-11-12 02:20:34,886 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-12 02:20:34,886 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-12 02:20:34,887 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 02:20:34,887 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 02:20:34,991 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:20:34,992 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/witness.yml [2023-11-12 02:20:34,992 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:20:34,993 INFO L158 Benchmark]: Toolchain (without parser) took 41307.26ms. Allocated memory was 207.6MB in the beginning and 360.7MB in the end (delta: 153.1MB). Free memory was 161.3MB in the beginning and 239.5MB in the end (delta: -78.2MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2023-11-12 02:20:34,994 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 146.8MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:34,995 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.96ms. Allocated memory is still 207.6MB. Free memory was 161.0MB in the beginning and 150.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:20:34,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.87ms. Allocated memory is still 207.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:20:34,995 INFO L158 Benchmark]: Boogie Preprocessor took 34.74ms. Allocated memory is still 207.6MB. Free memory was 148.0MB in the beginning and 146.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:20:34,996 INFO L158 Benchmark]: RCFGBuilder took 504.00ms. Allocated memory is still 207.6MB. Free memory was 146.6MB in the beginning and 130.3MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-12 02:20:34,996 INFO L158 Benchmark]: TraceAbstraction took 40324.98ms. Allocated memory was 207.6MB in the beginning and 360.7MB in the end (delta: 153.1MB). Free memory was 129.6MB in the beginning and 245.1MB in the end (delta: -115.5MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2023-11-12 02:20:34,999 INFO L158 Benchmark]: Witness Printer took 121.75ms. Allocated memory is still 360.7MB. Free memory was 245.1MB in the beginning and 239.5MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 02:20:35,009 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 146.8MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.96ms. Allocated memory is still 207.6MB. Free memory was 161.0MB in the beginning and 150.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.87ms. Allocated memory is still 207.6MB. Free memory was 149.6MB in the beginning and 148.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.74ms. Allocated memory is still 207.6MB. Free memory was 148.0MB in the beginning and 146.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 504.00ms. Allocated memory is still 207.6MB. Free memory was 146.6MB in the beginning and 130.3MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 40324.98ms. Allocated memory was 207.6MB in the beginning and 360.7MB in the end (delta: 153.1MB). Free memory was 129.6MB in the beginning and 245.1MB in the end (delta: -115.5MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. * Witness Printer took 121.75ms. Allocated memory is still 360.7MB. Free memory was 245.1MB in the beginning and 239.5MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 35]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 40.3s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1943 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1939 mSDsluCounter, 3218 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2578 mSDsCounter, 229 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4084 IncrementalHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 229 mSolverCounterUnsat, 640 mSDtfsCounter, 4084 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 915 GetRequests, 561 SyntacticMatches, 4 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=13, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 147 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 26.9s InterpolantComputationTime, 847 NumberOfCodeBlocks, 847 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1058 ConstructedInterpolants, 25 QuantifiedInterpolants, 12171 SizeOfPredicates, 158 NumberOfNonLiveVariables, 1435 ConjunctsInSsa, 280 ConjunctsInUnsatCore, 33 InterpolantComputations, 10 PerfectInterpolantSequences, 355/541 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 02:20:35,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8bdbdd3-50d1-4281-8e6f-84086c9fa2f7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE