./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-backwards.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-backwards.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme --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 64bit --witnessprinter.graph.data.programhash c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:14,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:14,579 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 10:41:14,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:14,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:14,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:14,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:14,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:14,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:14,679 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:14,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:14,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:14,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:14,683 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:14,684 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:14,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:14,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:14,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:14,686 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:41:14,687 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:41:14,687 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:41:14,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:14,688 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:41:14,689 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:41:14,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:14,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:14,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:14,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:14,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:14,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:14,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:14,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:14,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:14,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:14,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:14,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:14,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:14,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:14,712 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_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 [2023-11-26 10:41:15,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:15,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:15,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:15,142 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:15,143 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:15,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-broom/dll-backwards.i [2023-11-26 10:41:18,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:18,740 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:18,741 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/sv-benchmarks/c/memsafety-broom/dll-backwards.i [2023-11-26 10:41:18,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/data/390cd92ee/b4f38c31c06042429ef0d79feff23ab6/FLAGf6a13f801 [2023-11-26 10:41:18,846 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/data/390cd92ee/b4f38c31c06042429ef0d79feff23ab6 [2023-11-26 10:41:18,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:18,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:18,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:18,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:18,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:18,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:18" (1/1) ... [2023-11-26 10:41:18,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d8b27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:18, skipping insertion in model container [2023-11-26 10:41:18,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:18" (1/1) ... [2023-11-26 10:41:18,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:19,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:19,310 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:19,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:19,407 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:19,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19 WrapperNode [2023-11-26 10:41:19,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:19,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:19,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:19,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:19,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,458 INFO L138 Inliner]: procedures = 119, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 73 [2023-11-26 10:41:19,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:19,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:19,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:19,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:19,472 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,479 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,517 INFO L175 MemorySlicer]: Split 9 memory accesses to 1 slices as follows [9]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2023-11-26 10:41:19,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,526 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:19,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:19,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:19,540 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:19,541 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (1/1) ... [2023-11-26 10:41:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:19,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:19,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-26 10:41:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-26 10:41:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:41:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:41:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:41:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:41:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:19,825 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:19,827 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:20,116 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:20,170 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:20,171 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:41:20,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:20 BoogieIcfgContainer [2023-11-26 10:41:20,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:20,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:20,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:20,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:20,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:18" (1/3) ... [2023-11-26 10:41:20,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9fb01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:20, skipping insertion in model container [2023-11-26 10:41:20,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:19" (2/3) ... [2023-11-26 10:41:20,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9fb01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:20, skipping insertion in model container [2023-11-26 10:41:20,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:20" (3/3) ... [2023-11-26 10:41:20,181 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-backwards.i [2023-11-26 10:41:20,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:20,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-26 10:41:20,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:20,266 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;@5dbf63f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:20,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-26 10:41:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 25 states have (on average 2.2) internal successors, (55), 47 states have internal predecessors, (55), 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) [2023-11-26 10:41:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:41:20,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:20,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:41:20,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:20,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 4543610, now seen corresponding path program 1 times [2023-11-26 10:41:20,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:20,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803242882] [2023-11-26 10:41:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:20,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:20,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:20,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803242882] [2023-11-26 10:41:20,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803242882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:20,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376122432] [2023-11-26 10:41:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:20,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:20,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:20,603 INFO L87 Difference]: Start difference. First operand has 51 states, 25 states have (on average 2.2) internal successors, (55), 47 states have internal predecessors, (55), 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:20,742 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-11-26 10:41:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:41:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:20,756 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:41:20,757 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 10:41:20,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:20,765 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:20,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 64 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 10:41:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-26 10:41:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 25 states have (on average 1.92) internal successors, (48), 44 states have internal predecessors, (48), 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) [2023-11-26 10:41:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-26 10:41:20,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 4 [2023-11-26 10:41:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-26 10:41:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-26 10:41:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:41:20,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:20,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:41:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:20,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 4543611, now seen corresponding path program 1 times [2023-11-26 10:41:20,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:20,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633186302] [2023-11-26 10:41:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633186302] [2023-11-26 10:41:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633186302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:21,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:21,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:21,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41745398] [2023-11-26 10:41:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:21,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:21,075 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:21,159 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-11-26 10:41:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:41:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:21,161 INFO L225 Difference]: With dead ends: 46 [2023-11-26 10:41:21,162 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:41:21,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:21,164 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:21,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:41:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-26 10:41:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.84) internal successors, (46), 42 states have internal predecessors, (46), 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) [2023-11-26 10:41:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-11-26 10:41:21,173 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 4 [2023-11-26 10:41:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:21,174 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-11-26 10:41:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-11-26 10:41:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:41:21,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:21,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:21,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:21,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1597871579, now seen corresponding path program 1 times [2023-11-26 10:41:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440592026] [2023-11-26 10:41:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:21,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:21,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440592026] [2023-11-26 10:41:21,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440592026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:21,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:21,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:41:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021661224] [2023-11-26 10:41:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:41:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:41:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:41:21,501 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:21,744 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-26 10:41:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 10:41:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:21,749 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:41:21,749 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 10:41:21,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:21,761 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:21,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 10:41:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-11-26 10:41:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.793103448275862) internal successors, (52), 46 states have internal predecessors, (52), 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) [2023-11-26 10:41:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-26 10:41:21,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2023-11-26 10:41:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:21,789 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-26 10:41:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-26 10:41:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:41:21,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:21,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:41:21,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1597871580, now seen corresponding path program 1 times [2023-11-26 10:41:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410920918] [2023-11-26 10:41:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:22,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410920918] [2023-11-26 10:41:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410920918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:22,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:41:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862178223] [2023-11-26 10:41:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:41:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:41:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:41:22,275 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:22,497 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-11-26 10:41:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 10:41:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:22,501 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:41:22,501 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:41:22,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:22,514 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:22,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 180 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:41:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-26 10:41:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 46 states have internal predecessors, (51), 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) [2023-11-26 10:41:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-26 10:41:22,525 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 11 [2023-11-26 10:41:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:22,526 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-26 10:41:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-26 10:41:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:41:22,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:22,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:41:22,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:22,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2043633508, now seen corresponding path program 1 times [2023-11-26 10:41:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:22,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151267613] [2023-11-26 10:41:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:22,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:22,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151267613] [2023-11-26 10:41:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151267613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:22,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:22,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:41:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142669642] [2023-11-26 10:41:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:41:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:41:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:22,965 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:23,169 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-11-26 10:41:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:41:23,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 10:41:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:23,171 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:41:23,171 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:41:23,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:41:23,172 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:23,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 245 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:41:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-26 10:41:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 47 states have internal predecessors, (52), 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) [2023-11-26 10:41:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-26 10:41:23,180 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 13 [2023-11-26 10:41:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:23,180 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-26 10:41:23,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-26 10:41:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:41:23,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:23,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:23,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:41:23,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:23,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 413516713, now seen corresponding path program 1 times [2023-11-26 10:41:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:23,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739102090] [2023-11-26 10:41:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:23,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:23,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:23,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739102090] [2023-11-26 10:41:23,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739102090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:23,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080705223] [2023-11-26 10:41:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:23,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:23,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:23,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:41:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:23,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:41:23,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:23,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:23,729 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 10:41:23,806 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 10:41:23,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 10:41:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-26 10:41:23,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080705223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:23,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:23,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-26 10:41:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916213644] [2023-11-26 10:41:23,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:41:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:41:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-26 10:41:23,907 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:24,207 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-26 10:41:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:41:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2023-11-26 10:41:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:24,209 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:41:24,209 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 10:41:24,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-26 10:41:24,211 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:24,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2023-11-26 10:41:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 10:41:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-11-26 10:41:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 46 states have internal predecessors, (52), 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) [2023-11-26 10:41:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-26 10:41:24,218 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 15 [2023-11-26 10:41:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:24,218 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-26 10:41:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-26 10:41:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:41:24,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:24,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:24,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:41:24,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:41:24,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash 413516714, now seen corresponding path program 1 times [2023-11-26 10:41:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:24,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126396570] [2023-11-26 10:41:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:24,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126396570] [2023-11-26 10:41:24,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126396570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246379694] [2023-11-26 10:41:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:24,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:24,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:24,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:41:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:25,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 10:41:25,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:25,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:41:25,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:25,232 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:41:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:41:25,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 10:41:25,295 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:41:25,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:41:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-26 10:41:25,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246379694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2023-11-26 10:41:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166753287] [2023-11-26 10:41:25,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:25,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:41:25,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:41:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-11-26 10:41:25,483 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:25,852 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-26 10:41:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2023-11-26 10:41:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:25,853 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:41:25,854 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:41:25,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-11-26 10:41:25,855 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:25,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 229 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2023-11-26 10:41:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:41:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-11-26 10:41:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 49 states have internal predecessors, (56), 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) [2023-11-26 10:41:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-11-26 10:41:25,863 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 15 [2023-11-26 10:41:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:25,864 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-11-26 10:41:25,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-11-26 10:41:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:41:25,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:25,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:25,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:41:26,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:26,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1131737851, now seen corresponding path program 1 times [2023-11-26 10:41:26,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:26,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582969312] [2023-11-26 10:41:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:26,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582969312] [2023-11-26 10:41:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582969312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:41:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094106] [2023-11-26 10:41:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:41:26,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:41:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:26,250 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:26,458 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2023-11-26 10:41:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:41:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-26 10:41:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:26,460 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:41:26,460 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:41:26,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:26,462 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:26,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 161 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:41:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-26 10:41:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-11-26 10:41:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-26 10:41:26,477 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2023-11-26 10:41:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:26,478 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-26 10:41:26,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-26 10:41:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:41:26,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:26,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:41:26,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:26,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1131737850, now seen corresponding path program 1 times [2023-11-26 10:41:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654443424] [2023-11-26 10:41:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654443424] [2023-11-26 10:41:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654443424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:26,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:41:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050077988] [2023-11-26 10:41:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:41:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:41:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:26,776 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:27,002 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-11-26 10:41:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:41:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-26 10:41:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:27,004 INFO L225 Difference]: With dead ends: 60 [2023-11-26 10:41:27,004 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 10:41:27,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:27,005 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:27,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 174 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 10:41:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-11-26 10:41:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.641025641025641) internal successors, (64), 54 states have internal predecessors, (64), 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) [2023-11-26 10:41:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-11-26 10:41:27,012 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 15 [2023-11-26 10:41:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:27,013 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-11-26 10:41:27,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-11-26 10:41:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:41:27,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:41:27,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:27,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2042304147, now seen corresponding path program 1 times [2023-11-26 10:41:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445379997] [2023-11-26 10:41:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445379997] [2023-11-26 10:41:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445379997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:27,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:41:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377381741] [2023-11-26 10:41:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:41:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:41:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:41:27,184 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:27,356 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-11-26 10:41:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:41:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:27,358 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:41:27,358 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:41:27,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:27,359 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:41:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-26 10:41:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 53 states have internal predecessors, (62), 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) [2023-11-26 10:41:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-11-26 10:41:27,365 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 17 [2023-11-26 10:41:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:27,365 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-11-26 10:41:27,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-11-26 10:41:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:41:27,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:41:27,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:27,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2042304146, now seen corresponding path program 1 times [2023-11-26 10:41:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846461435] [2023-11-26 10:41:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846461435] [2023-11-26 10:41:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846461435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:27,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:41:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640647696] [2023-11-26 10:41:27,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:41:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:41:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:41:27,682 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:27,850 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-26 10:41:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:41:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:27,851 INFO L225 Difference]: With dead ends: 57 [2023-11-26 10:41:27,852 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 10:41:27,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:27,853 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:27,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 169 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 10:41:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-26 10:41:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 52 states have internal predecessors, (60), 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) [2023-11-26 10:41:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-11-26 10:41:27,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 17 [2023-11-26 10:41:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-11-26 10:41:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-11-26 10:41:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:41:27,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:41:27,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:27,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash -973399857, now seen corresponding path program 1 times [2023-11-26 10:41:27,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477924270] [2023-11-26 10:41:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477924270] [2023-11-26 10:41:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477924270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:41:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386366732] [2023-11-26 10:41:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:41:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:41:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:28,029 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:28,176 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-11-26 10:41:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:41:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-26 10:41:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:28,178 INFO L225 Difference]: With dead ends: 65 [2023-11-26 10:41:28,178 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 10:41:28,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:28,179 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:28,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 211 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 10:41:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2023-11-26 10:41:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 56 states have internal predecessors, (66), 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) [2023-11-26 10:41:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-11-26 10:41:28,186 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2023-11-26 10:41:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:28,186 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-11-26 10:41:28,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-11-26 10:41:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:41:28,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:28,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:41:28,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:28,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -973307184, now seen corresponding path program 1 times [2023-11-26 10:41:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940172153] [2023-11-26 10:41:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:28,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940172153] [2023-11-26 10:41:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940172153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106827501] [2023-11-26 10:41:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:28,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:28,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:41:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-26 10:41:28,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:28,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:41:28,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:28,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:29,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106827501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:29,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:29,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2023-11-26 10:41:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388544433] [2023-11-26 10:41:29,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:29,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:41:29,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:41:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:41:29,612 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:41:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:29,934 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-11-26 10:41:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:41:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-11-26 10:41:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:29,936 INFO L225 Difference]: With dead ends: 62 [2023-11-26 10:41:29,936 INFO L226 Difference]: Without dead ends: 62 [2023-11-26 10:41:29,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:41:29,937 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:29,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 303 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:41:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-26 10:41:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-26 10:41:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 57 states have internal predecessors, (67), 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) [2023-11-26 10:41:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-11-26 10:41:29,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 17 [2023-11-26 10:41:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:29,942 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-11-26 10:41:29,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:41:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-11-26 10:41:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:41:29,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:29,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:29,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:41:30,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:30,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 954615770, now seen corresponding path program 1 times [2023-11-26 10:41:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:30,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746520694] [2023-11-26 10:41:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:30,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746520694] [2023-11-26 10:41:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746520694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:30,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:30,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:41:30,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782495712] [2023-11-26 10:41:30,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:41:30,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:41:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:30,311 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:30,510 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-26 10:41:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:41:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-26 10:41:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:30,511 INFO L225 Difference]: With dead ends: 72 [2023-11-26 10:41:30,511 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 10:41:30,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:30,512 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:30,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 139 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 10:41:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2023-11-26 10:41:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 states have internal predecessors, (70), 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) [2023-11-26 10:41:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-26 10:41:30,516 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 19 [2023-11-26 10:41:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:30,516 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-26 10:41:30,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-26 10:41:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:41:30,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:30,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:41:30,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash 954615771, now seen corresponding path program 1 times [2023-11-26 10:41:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052288316] [2023-11-26 10:41:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:30,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052288316] [2023-11-26 10:41:30,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052288316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:30,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:30,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:41:30,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816826651] [2023-11-26 10:41:30,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:30,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:41:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:41:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:30,777 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:31,022 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-11-26 10:41:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:41:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-26 10:41:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:31,024 INFO L225 Difference]: With dead ends: 83 [2023-11-26 10:41:31,024 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 10:41:31,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:31,025 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:31,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 10:41:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2023-11-26 10:41:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.5) internal successors, (75), 62 states have internal predecessors, (75), 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) [2023-11-26 10:41:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-11-26 10:41:31,029 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 19 [2023-11-26 10:41:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:31,029 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-11-26 10:41:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-11-26 10:41:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:41:31,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:31,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:41:31,030 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:31,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash -471683646, now seen corresponding path program 1 times [2023-11-26 10:41:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219459895] [2023-11-26 10:41:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219459895] [2023-11-26 10:41:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219459895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:31,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:41:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458263394] [2023-11-26 10:41:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:41:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:41:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:31,167 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:31,343 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2023-11-26 10:41:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:41:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-26 10:41:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:31,345 INFO L225 Difference]: With dead ends: 95 [2023-11-26 10:41:31,345 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 10:41:31,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:31,346 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 207 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 10:41:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2023-11-26 10:41:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.509090909090909) internal successors, (83), 67 states have internal predecessors, (83), 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) [2023-11-26 10:41:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2023-11-26 10:41:31,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 20 [2023-11-26 10:41:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2023-11-26 10:41:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2023-11-26 10:41:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:41:31,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:31,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:31,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:41:31,357 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:31,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1737215432, now seen corresponding path program 1 times [2023-11-26 10:41:31,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:31,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941274943] [2023-11-26 10:41:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941274943] [2023-11-26 10:41:31,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941274943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:31,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:31,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:41:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431759684] [2023-11-26 10:41:31,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:31,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:41:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:41:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:41:31,560 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:31,743 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2023-11-26 10:41:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:41:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 10:41:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:31,745 INFO L225 Difference]: With dead ends: 93 [2023-11-26 10:41:31,745 INFO L226 Difference]: Without dead ends: 93 [2023-11-26 10:41:31,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:31,746 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:31,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 183 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-26 10:41:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2023-11-26 10:41:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 70 states have internal predecessors, (88), 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) [2023-11-26 10:41:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-26 10:41:31,750 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 21 [2023-11-26 10:41:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:31,750 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-26 10:41:31,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-26 10:41:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 10:41:31,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:31,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:31,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:41:31,752 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1188610864, now seen corresponding path program 1 times [2023-11-26 10:41:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:31,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555163990] [2023-11-26 10:41:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:31,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:41:31,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555163990] [2023-11-26 10:41:31,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555163990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614469744] [2023-11-26 10:41:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:31,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:31,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:41:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:31,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:41:31,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:41:32,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:32,038 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:41:32,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-26 10:41:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:41:32,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614469744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:32,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:32,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2023-11-26 10:41:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888642995] [2023-11-26 10:41:32,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:41:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:41:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:41:32,056 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:41:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:32,162 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2023-11-26 10:41:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:41:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-26 10:41:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:32,163 INFO L225 Difference]: With dead ends: 81 [2023-11-26 10:41:32,164 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 10:41:32,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:41:32,165 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:32,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 10:41:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2023-11-26 10:41:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 74 states have internal predecessors, (94), 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) [2023-11-26 10:41:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2023-11-26 10:41:32,170 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 22 [2023-11-26 10:41:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:32,170 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2023-11-26 10:41:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:41:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2023-11-26 10:41:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 10:41:32,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:32,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:32,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:41:32,379 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1188610863, now seen corresponding path program 1 times [2023-11-26 10:41:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:32,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337058584] [2023-11-26 10:41:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:32,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:32,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337058584] [2023-11-26 10:41:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337058584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141287582] [2023-11-26 10:41:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:32,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:32,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:32,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:41:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:32,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:41:32,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:41:32,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:33,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:33,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-11-26 10:41:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:41:33,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141287582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:33,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:33,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2023-11-26 10:41:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8542560] [2023-11-26 10:41:33,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:33,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:41:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:41:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:41:33,146 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:41:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:33,328 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2023-11-26 10:41:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:41:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 22 [2023-11-26 10:41:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:33,330 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:41:33,330 INFO L226 Difference]: Without dead ends: 82 [2023-11-26 10:41:33,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:41:33,331 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:33,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 274 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-26 10:41:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-11-26 10:41:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.5) internal successors, (93), 74 states have internal predecessors, (93), 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) [2023-11-26 10:41:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2023-11-26 10:41:33,336 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 22 [2023-11-26 10:41:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:33,336 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2023-11-26 10:41:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:41:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2023-11-26 10:41:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:41:33,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:33,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:33,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:33,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:33,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash 206331473, now seen corresponding path program 1 times [2023-11-26 10:41:33,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:33,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436315945] [2023-11-26 10:41:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:33,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:34,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436315945] [2023-11-26 10:41:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436315945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742833598] [2023-11-26 10:41:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:34,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:34,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:41:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:34,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-26 10:41:34,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:34,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:34,581 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:41:34,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:41:34,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:34,767 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:41:34,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:41:34,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:41:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:35,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:35,043 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_693 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_693) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) 1)) is different from false [2023-11-26 10:41:35,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:35,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-26 10:41:35,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:35,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-11-26 10:41:35,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-26 10:41:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742833598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:35,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:35,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2023-11-26 10:41:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851696667] [2023-11-26 10:41:35,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:41:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:41:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=829, Unknown=8, NotChecked=58, Total=992 [2023-11-26 10:41:35,512 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:36,158 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2023-11-26 10:41:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:41:36,160 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-26 10:41:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:36,161 INFO L225 Difference]: With dead ends: 86 [2023-11-26 10:41:36,161 INFO L226 Difference]: Without dead ends: 86 [2023-11-26 10:41:36,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1053, Unknown=8, NotChecked=66, Total=1260 [2023-11-26 10:41:36,163 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:36,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 429 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:41:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-26 10:41:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2023-11-26 10:41:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.515625) internal successors, (97), 76 states have internal predecessors, (97), 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) [2023-11-26 10:41:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2023-11-26 10:41:36,169 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 24 [2023-11-26 10:41:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:36,171 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2023-11-26 10:41:36,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2023-11-26 10:41:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:41:36,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:36,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:36,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:36,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:36,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 206331474, now seen corresponding path program 1 times [2023-11-26 10:41:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416659810] [2023-11-26 10:41:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:36,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:37,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:37,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416659810] [2023-11-26 10:41:37,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416659810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773450140] [2023-11-26 10:41:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:37,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:37,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:37,190 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:41:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:37,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-26 10:41:37,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:37,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:37,542 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:41:37,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:41:37,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:37,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:37,745 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:41:37,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:41:37,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-26 10:41:37,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:41:37,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:41:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:38,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:38,380 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_774 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_774) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (forall ((v_ArrVal_775 (Array Int Int)) (v_ArrVal_774 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_774) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_775) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))))) is different from false [2023-11-26 10:41:38,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:38,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-11-26 10:41:38,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:38,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-26 10:41:38,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:38,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2023-11-26 10:41:38,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2023-11-26 10:41:38,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-11-26 10:41:38,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-26 10:41:38,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:38,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-26 10:41:38,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:41:38,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-26 10:41:38,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:41:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773450140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:38,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2023-11-26 10:41:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949999749] [2023-11-26 10:41:38,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:41:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:41:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1004, Unknown=22, NotChecked=64, Total=1190 [2023-11-26 10:41:38,731 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:39,655 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2023-11-26 10:41:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:41:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-26 10:41:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:39,657 INFO L225 Difference]: With dead ends: 85 [2023-11-26 10:41:39,657 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 10:41:39,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=1535, Unknown=23, NotChecked=80, Total=1806 [2023-11-26 10:41:39,659 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:39,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 564 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:41:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 10:41:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-11-26 10:41:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.5) internal successors, (96), 76 states have internal predecessors, (96), 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) [2023-11-26 10:41:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-11-26 10:41:39,665 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 24 [2023-11-26 10:41:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:39,666 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-11-26 10:41:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:41:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-11-26 10:41:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:41:39,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:39,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:39,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:39,868 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:39,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash 971110861, now seen corresponding path program 1 times [2023-11-26 10:41:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:39,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617427413] [2023-11-26 10:41:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:39,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:40,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617427413] [2023-11-26 10:41:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617427413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955730724] [2023-11-26 10:41:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:40,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:40,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:41:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:40,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 10:41:40,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:40,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:40,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:40,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:41:40,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:40,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:41:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:40,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:41,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2023-11-26 10:41:41,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 10:41:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955730724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:41,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:41,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2023-11-26 10:41:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350199037] [2023-11-26 10:41:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:41:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:41:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:41:41,094 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:41,662 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2023-11-26 10:41:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:41:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-26 10:41:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:41,665 INFO L225 Difference]: With dead ends: 87 [2023-11-26 10:41:41,666 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 10:41:41,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:41:41,667 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:41,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 347 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:41:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 10:41:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-11-26 10:41:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 79 states have internal predecessors, (99), 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) [2023-11-26 10:41:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2023-11-26 10:41:41,672 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 24 [2023-11-26 10:41:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:41,673 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2023-11-26 10:41:41,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:41:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2023-11-26 10:41:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:41:41,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:41,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:41,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:41,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:41,881 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:41,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2033653730, now seen corresponding path program 1 times [2023-11-26 10:41:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:41,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856052077] [2023-11-26 10:41:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:42,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:41:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:41:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856052077] [2023-11-26 10:41:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856052077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142579613] [2023-11-26 10:41:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:42,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:42,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:42,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:41:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:42,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:41:42,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:42,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:42,904 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:41:42,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:41:42,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:43,050 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:41:43,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:41:43,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:41:43,144 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 10:41:43,198 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-26 10:41:43,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-26 10:41:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-11-26 10:41:43,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:43,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142579613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:43,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:43,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2023-11-26 10:41:43,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038564606] [2023-11-26 10:41:43,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:43,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:41:43,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:41:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=558, Unknown=1, NotChecked=48, Total=702 [2023-11-26 10:41:43,286 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 26 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:41:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:43,650 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2023-11-26 10:41:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:41:43,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-11-26 10:41:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:43,652 INFO L225 Difference]: With dead ends: 83 [2023-11-26 10:41:43,652 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 10:41:43,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=599, Unknown=1, NotChecked=50, Total=756 [2023-11-26 10:41:43,653 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:43,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 339 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2023-11-26 10:41:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 10:41:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 10:41:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.462686567164179) internal successors, (98), 78 states have internal predecessors, (98), 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) [2023-11-26 10:41:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-26 10:41:43,657 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 26 [2023-11-26 10:41:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-26 10:41:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:41:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-26 10:41:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:41:43,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:43,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:43,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:43,864 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:43,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2033653729, now seen corresponding path program 1 times [2023-11-26 10:41:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660682591] [2023-11-26 10:41:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:43,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:44,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:41:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:41:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660682591] [2023-11-26 10:41:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660682591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052906558] [2023-11-26 10:41:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:45,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:45,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:41:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:45,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 10:41:45,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:45,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:45,534 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:41:45,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:41:45,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:45,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:45,820 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:41:45,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2023-11-26 10:41:45,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2023-11-26 10:41:45,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2023-11-26 10:41:45,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-26 10:41:46,032 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:41:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:41:46,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:41:46,080 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-26 10:41:46,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-26 10:41:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-26 10:41:46,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052906558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:46,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:46,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2023-11-26 10:41:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674957001] [2023-11-26 10:41:46,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 10:41:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 10:41:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1024, Unknown=1, NotChecked=64, Total=1190 [2023-11-26 10:41:46,339 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 24 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 10:41:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:47,252 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2023-11-26 10:41:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:41:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 24 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2023-11-26 10:41:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:47,254 INFO L225 Difference]: With dead ends: 80 [2023-11-26 10:41:47,254 INFO L226 Difference]: Without dead ends: 80 [2023-11-26 10:41:47,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=1610, Unknown=1, NotChecked=82, Total=1892 [2023-11-26 10:41:47,256 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:47,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 378 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 465 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2023-11-26 10:41:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-26 10:41:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-26 10:41:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 75 states have internal predecessors, (95), 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) [2023-11-26 10:41:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-11-26 10:41:47,261 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 26 [2023-11-26 10:41:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:47,261 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-11-26 10:41:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 24 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 10:41:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-11-26 10:41:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:41:47,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:47,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:47,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:47,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:47,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:47,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 39664175, now seen corresponding path program 1 times [2023-11-26 10:41:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048752952] [2023-11-26 10:41:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:47,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:47,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048752952] [2023-11-26 10:41:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048752952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654480658] [2023-11-26 10:41:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:47,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:47,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:41:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:47,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 10:41:47,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:48,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-26 10:41:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:48,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:48,163 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_36| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_36| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_36|) 0)))) is different from false [2023-11-26 10:41:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654480658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:48,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:48,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2023-11-26 10:41:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557209637] [2023-11-26 10:41:48,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:48,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:41:48,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:41:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2023-11-26 10:41:48,167 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:48,544 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-11-26 10:41:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:41:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-26 10:41:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:48,546 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:41:48,546 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 10:41:48,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=231, Unknown=1, NotChecked=30, Total=306 [2023-11-26 10:41:48,547 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:48,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 180 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:41:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 10:41:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-26 10:41:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.509433962264151) internal successors, (80), 61 states have internal predecessors, (80), 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) [2023-11-26 10:41:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-26 10:41:48,551 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 25 [2023-11-26 10:41:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:48,551 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-26 10:41:48,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-26 10:41:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:41:48,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:48,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:48,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:48,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:48,763 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:48,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash 716059003, now seen corresponding path program 1 times [2023-11-26 10:41:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:48,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258864522] [2023-11-26 10:41:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:48,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:49,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:49,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258864522] [2023-11-26 10:41:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258864522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:49,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749165158] [2023-11-26 10:41:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:49,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:49,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:41:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:49,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 10:41:49,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:49,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:49,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:41:49,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:41:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:41:49,883 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:41:49,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-26 10:41:49,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-26 10:41:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:50,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:50,125 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1157 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_1157) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) 0))) is different from false [2023-11-26 10:41:50,132 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1157 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1157) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) 0))) is different from false [2023-11-26 10:41:50,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:50,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-26 10:41:50,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:50,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-11-26 10:41:50,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 10:41:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749165158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:50,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:50,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2023-11-26 10:41:50,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024708284] [2023-11-26 10:41:50,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:50,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:41:50,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:41:50,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=799, Unknown=2, NotChecked=114, Total=992 [2023-11-26 10:41:50,343 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:41:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:51,144 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-26 10:41:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:41:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-26 10:41:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:51,146 INFO L225 Difference]: With dead ends: 68 [2023-11-26 10:41:51,146 INFO L226 Difference]: Without dead ends: 68 [2023-11-26 10:41:51,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=1410, Unknown=2, NotChecked=154, Total=1722 [2023-11-26 10:41:51,148 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:51,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 463 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:41:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-26 10:41:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-11-26 10:41:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 61 states have internal predecessors, (77), 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) [2023-11-26 10:41:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2023-11-26 10:41:51,153 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 26 [2023-11-26 10:41:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:51,154 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2023-11-26 10:41:51,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:41:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2023-11-26 10:41:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:41:51,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:51,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:51,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:51,363 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-26 10:41:51,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:51,364 INFO L85 PathProgramCache]: Analyzing trace with hash 716120978, now seen corresponding path program 2 times [2023-11-26 10:41:51,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:51,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305528243] [2023-11-26 10:41:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:51,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:52,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:41:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:52,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:41:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305528243] [2023-11-26 10:41:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305528243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352040738] [2023-11-26 10:41:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:41:52,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:52,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:52,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_705e5f1a-eeb5-4bea-af34-8e386adfc337/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:41:52,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:41:52,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:52,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-26 10:41:52,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:52,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:41:52,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:52,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:41:52,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:41:52,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:41:52,879 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:41:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:41:52,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-26 10:41:52,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-11-26 10:41:53,160 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-26 10:41:53,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 64 [2023-11-26 10:41:53,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2023-11-26 10:41:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:53,559 INFO L327 TraceCheckSpWp]: Computing backward predicates...