./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:29:26,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:29:26,125 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:29:26,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:29:26,131 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:29:26,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:29:26,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:29:26,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:29:26,176 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:29:26,176 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:29:26,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:29:26,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:29:26,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:29:26,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:29:26,179 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:29:26,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:29:26,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:29:26,181 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:29:26,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:29:26,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:29:26,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:29:26,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:29:26,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:29:26,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:29:26,186 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:29:26,186 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:29:26,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:29:26,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:29:26,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:29:26,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:29:26,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:29:26,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:29:26,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:29:26,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:29:26,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:29:26,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:29:26,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:29:26,196 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:29:26,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:29:26,197 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:29:26,197 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:29:26,202 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:29:26,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:29:26,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:29:26,204 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_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2023-11-23 22:29:26,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:29:26,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:29:26,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:29:26,487 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:29:26,487 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:29:26,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2023-11-23 22:29:29,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:29:29,990 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:29:29,991 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2023-11-23 22:29:30,016 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/data/0217fcdbe/de6b0ee32a3d468aa2bae0d947b60506/FLAG826865f42 [2023-11-23 22:29:30,032 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/data/0217fcdbe/de6b0ee32a3d468aa2bae0d947b60506 [2023-11-23 22:29:30,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:29:30,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:29:30,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:30,044 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:29:30,050 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:29:30,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:30" (1/1) ... [2023-11-23 22:29:30,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240f8b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:30, skipping insertion in model container [2023-11-23 22:29:30,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:30" (1/1) ... [2023-11-23 22:29:30,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:29:30,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:30,975 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:29:31,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:29:31,230 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:29:31,237 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:29:31,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31 WrapperNode [2023-11-23 22:29:31,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:29:31,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:31,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:29:31,240 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:29:31,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,440 INFO L138 Inliner]: procedures = 282, calls = 351, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1552 [2023-11-23 22:29:31,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:29:31,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:29:31,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:29:31,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:29:31,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,502 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,698 INFO L189 HeapSplitter]: Split 311 memory accesses to 5 slices as follows [2, 2, 34, 268, 5] [2023-11-23 22:29:31,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:29:31,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:29:31,868 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:29:31,868 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:29:31,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (1/1) ... [2023-11-23 22:29:31,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:29:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:31,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:29:31,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:29:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-23 22:29:31,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-23 22:29:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:29:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 22:29:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 22:29:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 22:29:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 22:29:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 22:29:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 22:29:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:29:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2023-11-23 22:29:31,959 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2023-11-23 22:29:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:29:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:29:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:29:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:29:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:29:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:29:31,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:29:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:29:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:29:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:29:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:29:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:29:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:29:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:29:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2023-11-23 22:29:31,964 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 22:29:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2023-11-23 22:29:31,966 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2023-11-23 22:29:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:29:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:29:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:29:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:29:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:29:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:29:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:29:32,336 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:29:32,339 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:29:34,124 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:29:34,180 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:29:34,180 INFO L309 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-23 22:29:34,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:34 BoogieIcfgContainer [2023-11-23 22:29:34,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:29:34,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:29:34,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:29:34,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:29:34,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:30" (1/3) ... [2023-11-23 22:29:34,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ea78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:34, skipping insertion in model container [2023-11-23 22:29:34,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:31" (2/3) ... [2023-11-23 22:29:34,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ea78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:34, skipping insertion in model container [2023-11-23 22:29:34,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:34" (3/3) ... [2023-11-23 22:29:34,190 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-2.i [2023-11-23 22:29:34,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:29:34,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-23 22:29:34,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:29:34,282 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3d16f1aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:29:34,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-23 22:29:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 408 states have (on average 1.6862745098039216) internal successors, (688), 425 states have internal predecessors, (688), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 22:29:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 22:29:34,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:34,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 22:29:34,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:34,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -620020903, now seen corresponding path program 1 times [2023-11-23 22:29:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787606752] [2023-11-23 22:29:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787606752] [2023-11-23 22:29:34,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:29:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155961140] [2023-11-23 22:29:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:34,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:34,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:29:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:34,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:29:34,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:34,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155961140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:34,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:34,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227711963] [2023-11-23 22:29:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:29:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:29:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:29:34,836 INFO L87 Difference]: Start difference. First operand has 447 states, 408 states have (on average 1.6862745098039216) internal successors, (688), 425 states have internal predecessors, (688), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:35,017 INFO L93 Difference]: Finished difference Result 888 states and 1462 transitions. [2023-11-23 22:29:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:29:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 22:29:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:35,050 INFO L225 Difference]: With dead ends: 888 [2023-11-23 22:29:35,051 INFO L226 Difference]: Without dead ends: 435 [2023-11-23 22:29:35,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:29:35,061 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:35,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 632 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-23 22:29:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2023-11-23 22:29:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 402 states have (on average 1.4950248756218905) internal successors, (601), 416 states have internal predecessors, (601), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 22:29:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 631 transitions. [2023-11-23 22:29:35,160 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 631 transitions. Word has length 6 [2023-11-23 22:29:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:35,161 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 631 transitions. [2023-11-23 22:29:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 631 transitions. [2023-11-23 22:29:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 22:29:35,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:35,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 22:29:35,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:29:35,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:35,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -620018981, now seen corresponding path program 1 times [2023-11-23 22:29:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117453194] [2023-11-23 22:29:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:35,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:35,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418040658] [2023-11-23 22:29:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:35,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:35,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:35,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:29:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:35,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:35,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:35,714 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 [2023-11-23 22:29:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:35,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:35,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117453194] [2023-11-23 22:29:35,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418040658] [2023-11-23 22:29:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418040658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:35,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:35,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114358291] [2023-11-23 22:29:35,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:35,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:35,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:35,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:35,744 INFO L87 Difference]: Start difference. First operand 435 states and 631 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:35,935 INFO L93 Difference]: Finished difference Result 798 states and 1174 transitions. [2023-11-23 22:29:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:29:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 22:29:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:35,943 INFO L225 Difference]: With dead ends: 798 [2023-11-23 22:29:35,943 INFO L226 Difference]: Without dead ends: 796 [2023-11-23 22:29:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:35,946 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 518 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:35,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1789 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2023-11-23 22:29:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 441. [2023-11-23 22:29:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 408 states have (on average 1.4901960784313726) internal successors, (608), 422 states have internal predecessors, (608), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 22:29:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 638 transitions. [2023-11-23 22:29:35,997 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 638 transitions. Word has length 6 [2023-11-23 22:29:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:35,997 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 638 transitions. [2023-11-23 22:29:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 638 transitions. [2023-11-23 22:29:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 22:29:36,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:36,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:36,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:36,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1360533943, now seen corresponding path program 1 times [2023-11-23 22:29:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177110189] [2023-11-23 22:29:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-23 22:29:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-23 22:29:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-23 22:29:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:29:36,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177110189] [2023-11-23 22:29:36,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177110189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:36,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:36,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:29:36,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93890846] [2023-11-23 22:29:36,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:36,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:36,588 INFO L87 Difference]: Start difference. First operand 441 states and 638 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:29:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:36,812 INFO L93 Difference]: Finished difference Result 1025 states and 1504 transitions. [2023-11-23 22:29:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:29:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-23 22:29:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:36,821 INFO L225 Difference]: With dead ends: 1025 [2023-11-23 22:29:36,821 INFO L226 Difference]: Without dead ends: 795 [2023-11-23 22:29:36,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:36,829 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 519 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:36,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1803 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-23 22:29:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 441. [2023-11-23 22:29:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 408 states have (on average 1.4877450980392157) internal successors, (607), 422 states have internal predecessors, (607), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 22:29:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 637 transitions. [2023-11-23 22:29:36,859 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 637 transitions. Word has length 33 [2023-11-23 22:29:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:36,862 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 637 transitions. [2023-11-23 22:29:36,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:29:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 637 transitions. [2023-11-23 22:29:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 22:29:36,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:36,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:29:36,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 652069050, now seen corresponding path program 1 times [2023-11-23 22:29:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010223135] [2023-11-23 22:29:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:36,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774218956] [2023-11-23 22:29:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:36,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:36,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:36,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:29:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:37,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:29:37,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:37,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010223135] [2023-11-23 22:29:37,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774218956] [2023-11-23 22:29:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774218956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:37,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:29:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810672132] [2023-11-23 22:29:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:29:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:29:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:37,223 INFO L87 Difference]: Start difference. First operand 441 states and 637 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-23 22:29:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:37,330 INFO L93 Difference]: Finished difference Result 896 states and 1298 transitions. [2023-11-23 22:29:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:29:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 62 [2023-11-23 22:29:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:37,334 INFO L225 Difference]: With dead ends: 896 [2023-11-23 22:29:37,334 INFO L226 Difference]: Without dead ends: 462 [2023-11-23 22:29:37,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:37,337 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 9 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:37,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1192 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-23 22:29:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 461. [2023-11-23 22:29:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 428 states have (on average 1.4649532710280373) internal successors, (627), 442 states have internal predecessors, (627), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 22:29:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 657 transitions. [2023-11-23 22:29:37,354 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 657 transitions. Word has length 62 [2023-11-23 22:29:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:37,354 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 657 transitions. [2023-11-23 22:29:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-23 22:29:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 657 transitions. [2023-11-23 22:29:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 22:29:37,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:37,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:37,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:37,571 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:37,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1593510404, now seen corresponding path program 1 times [2023-11-23 22:29:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4722808] [2023-11-23 22:29:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:37,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754684624] [2023-11-23 22:29:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:37,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:37,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:29:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:37,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:29:37,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:37,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:37,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:37,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4722808] [2023-11-23 22:29:37,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754684624] [2023-11-23 22:29:37,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754684624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:37,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:37,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:29:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545300574] [2023-11-23 22:29:37,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:37,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:37,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:37,948 INFO L87 Difference]: Start difference. First operand 461 states and 657 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-23 22:29:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:38,091 INFO L93 Difference]: Finished difference Result 902 states and 1294 transitions. [2023-11-23 22:29:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:29:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 62 [2023-11-23 22:29:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:38,095 INFO L225 Difference]: With dead ends: 902 [2023-11-23 22:29:38,095 INFO L226 Difference]: Without dead ends: 448 [2023-11-23 22:29:38,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:38,098 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 165 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:38,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1636 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-23 22:29:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2023-11-23 22:29:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 414 states have (on average 1.463768115942029) internal successors, (606), 428 states have internal predecessors, (606), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 22:29:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 636 transitions. [2023-11-23 22:29:38,118 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 636 transitions. Word has length 62 [2023-11-23 22:29:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:38,119 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 636 transitions. [2023-11-23 22:29:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-11-23 22:29:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 636 transitions. [2023-11-23 22:29:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 22:29:38,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:38,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:38,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:38,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:38,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1885403438, now seen corresponding path program 1 times [2023-11-23 22:29:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:38,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112315276] [2023-11-23 22:29:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:38,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152960863] [2023-11-23 22:29:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:38,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:38,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:38,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:38,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:29:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:38,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:29:38,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:38,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:38,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112315276] [2023-11-23 22:29:38,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152960863] [2023-11-23 22:29:38,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152960863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:38,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:38,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655874203] [2023-11-23 22:29:38,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:38,817 INFO L87 Difference]: Start difference. First operand 447 states and 636 transitions. Second operand has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-23 22:29:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:38,926 INFO L93 Difference]: Finished difference Result 870 states and 1248 transitions. [2023-11-23 22:29:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:29:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 62 [2023-11-23 22:29:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:38,933 INFO L225 Difference]: With dead ends: 870 [2023-11-23 22:29:38,933 INFO L226 Difference]: Without dead ends: 868 [2023-11-23 22:29:38,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:38,934 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 544 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:38,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1918 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2023-11-23 22:29:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 856. [2023-11-23 22:29:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 808 states have (on average 1.4690594059405941) internal successors, (1187), 824 states have internal predecessors, (1187), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (30), 24 states have call predecessors, (30), 27 states have call successors, (30) [2023-11-23 22:29:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1244 transitions. [2023-11-23 22:29:38,972 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1244 transitions. Word has length 62 [2023-11-23 22:29:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:38,972 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1244 transitions. [2023-11-23 22:29:38,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-23 22:29:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1244 transitions. [2023-11-23 22:29:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 22:29:38,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:38,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:39,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:29:39,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:39,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1682035525, now seen corresponding path program 1 times [2023-11-23 22:29:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:39,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099257251] [2023-11-23 22:29:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:39,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626196036] [2023-11-23 22:29:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:39,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:39,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:39,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:39,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:29:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:39,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:29:39,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:39,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:39,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099257251] [2023-11-23 22:29:39,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626196036] [2023-11-23 22:29:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626196036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:39,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331195848] [2023-11-23 22:29:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:39,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:29:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:29:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:29:39,619 INFO L87 Difference]: Start difference. First operand 856 states and 1244 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-23 22:29:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:39,734 INFO L93 Difference]: Finished difference Result 1453 states and 2119 transitions. [2023-11-23 22:29:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:29:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 63 [2023-11-23 22:29:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:39,746 INFO L225 Difference]: With dead ends: 1453 [2023-11-23 22:29:39,747 INFO L226 Difference]: Without dead ends: 1451 [2023-11-23 22:29:39,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:39,752 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 485 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1828 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2023-11-23 22:29:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1443. [2023-11-23 22:29:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1378 states have (on average 1.474600870827286) internal successors, (2032), 1396 states have internal predecessors, (2032), 41 states have call successors, (41), 13 states have call predecessors, (41), 10 states have return successors, (44), 34 states have call predecessors, (44), 41 states have call successors, (44) [2023-11-23 22:29:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2117 transitions. [2023-11-23 22:29:39,811 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2117 transitions. Word has length 63 [2023-11-23 22:29:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:39,812 INFO L495 AbstractCegarLoop]: Abstraction has 1443 states and 2117 transitions. [2023-11-23 22:29:39,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-23 22:29:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2117 transitions. [2023-11-23 22:29:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 22:29:39,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:39,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:39,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:29:40,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting alt_bzeroErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:40,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -304228015, now seen corresponding path program 1 times [2023-11-23 22:29:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:40,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066911654] [2023-11-23 22:29:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:40,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493938489] [2023-11-23 22:29:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:40,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:40,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:40,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:29:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:40,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:29:40,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:40,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066911654] [2023-11-23 22:29:40,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493938489] [2023-11-23 22:29:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493938489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:40,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:40,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:29:40,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013532880] [2023-11-23 22:29:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:40,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:29:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:29:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:40,487 INFO L87 Difference]: Start difference. First operand 1443 states and 2117 transitions. Second operand has 3 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:40,546 INFO L93 Difference]: Finished difference Result 1443 states and 2117 transitions. [2023-11-23 22:29:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:29:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 1 states have call successors, (2), 1 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 71 [2023-11-23 22:29:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:40,557 INFO L225 Difference]: With dead ends: 1443 [2023-11-23 22:29:40,558 INFO L226 Difference]: Without dead ends: 1442 [2023-11-23 22:29:40,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:40,560 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 552 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 611 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:29:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2023-11-23 22:29:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1442. [2023-11-23 22:29:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1378 states have (on average 1.4731494920174166) internal successors, (2030), 1395 states have internal predecessors, (2030), 41 states have call successors, (41), 13 states have call predecessors, (41), 10 states have return successors, (44), 34 states have call predecessors, (44), 41 states have call successors, (44) [2023-11-23 22:29:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2115 transitions. [2023-11-23 22:29:40,625 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2115 transitions. Word has length 71 [2023-11-23 22:29:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:40,626 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 2115 transitions. [2023-11-23 22:29:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2115 transitions. [2023-11-23 22:29:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 22:29:40,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:40,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:40,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:40,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting alt_bzeroErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:40,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash -841133804, now seen corresponding path program 1 times [2023-11-23 22:29:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165419219] [2023-11-23 22:29:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:40,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:40,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480041620] [2023-11-23 22:29:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:40,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:40,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:40,883 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:40,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:29:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:41,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:29:41,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:41,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165419219] [2023-11-23 22:29:41,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480041620] [2023-11-23 22:29:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480041620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:41,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:41,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:29:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111051924] [2023-11-23 22:29:41,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:41,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:29:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:29:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:41,324 INFO L87 Difference]: Start difference. First operand 1442 states and 2115 transitions. Second operand has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:41,404 INFO L93 Difference]: Finished difference Result 1469 states and 2135 transitions. [2023-11-23 22:29:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:29:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (2), 1 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 72 [2023-11-23 22:29:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:41,418 INFO L225 Difference]: With dead ends: 1469 [2023-11-23 22:29:41,418 INFO L226 Difference]: Without dead ends: 1468 [2023-11-23 22:29:41,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:41,421 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 491 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:41,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1223 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:29:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2023-11-23 22:29:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1459. [2023-11-23 22:29:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1390 states have (on average 1.4697841726618706) internal successors, (2043), 1408 states have internal predecessors, (2043), 44 states have call successors, (44), 15 states have call predecessors, (44), 12 states have return successors, (47), 37 states have call predecessors, (47), 44 states have call successors, (47) [2023-11-23 22:29:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2134 transitions. [2023-11-23 22:29:41,492 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2134 transitions. Word has length 72 [2023-11-23 22:29:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2134 transitions. [2023-11-23 22:29:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:29:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2134 transitions. [2023-11-23 22:29:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 22:29:41,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:41,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:41,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:41,718 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:41,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 494764585, now seen corresponding path program 1 times [2023-11-23 22:29:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:41,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101307406] [2023-11-23 22:29:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:41,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:41,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603058221] [2023-11-23 22:29:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:41,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:41,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:41,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:41,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:29:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:42,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:29:42,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:42,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101307406] [2023-11-23 22:29:42,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603058221] [2023-11-23 22:29:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603058221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:42,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:29:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2023-11-23 22:29:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273219389] [2023-11-23 22:29:42,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:29:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:29:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:29:42,585 INFO L87 Difference]: Start difference. First operand 1459 states and 2134 transitions. Second operand has 14 states, 13 states have (on average 11.384615384615385) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:29:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:43,760 INFO L93 Difference]: Finished difference Result 3583 states and 5230 transitions. [2023-11-23 22:29:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 22:29:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 11.384615384615385) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 79 [2023-11-23 22:29:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:43,783 INFO L225 Difference]: With dead ends: 3583 [2023-11-23 22:29:43,783 INFO L226 Difference]: Without dead ends: 3581 [2023-11-23 22:29:43,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2023-11-23 22:29:43,785 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 3802 mSDsluCounter, 6896 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3821 SdHoareTripleChecker+Valid, 7529 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:43,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3821 Valid, 7529 Invalid, 782 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [227 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:29:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2023-11-23 22:29:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3288. [2023-11-23 22:29:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3147 states have (on average 1.4680648236415634) internal successors, (4620), 3169 states have internal predecessors, (4620), 101 states have call successors, (101), 33 states have call predecessors, (101), 27 states have return successors, (122), 86 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-23 22:29:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4843 transitions. [2023-11-23 22:29:43,927 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4843 transitions. Word has length 79 [2023-11-23 22:29:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:43,928 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 4843 transitions. [2023-11-23 22:29:43,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 11.384615384615385) internal successors, (148), 12 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 22:29:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4843 transitions. [2023-11-23 22:29:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 22:29:43,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:43,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:43,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:44,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:44,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:44,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2092260, now seen corresponding path program 1 times [2023-11-23 22:29:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502717708] [2023-11-23 22:29:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:44,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864780339] [2023-11-23 22:29:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:44,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:44,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:44,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:29:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:44,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:29:44,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:44,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:44,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502717708] [2023-11-23 22:29:44,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864780339] [2023-11-23 22:29:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864780339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:44,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:44,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:29:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710204076] [2023-11-23 22:29:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:29:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:29:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:44,825 INFO L87 Difference]: Start difference. First operand 3288 states and 4843 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:45,131 INFO L93 Difference]: Finished difference Result 7216 states and 10686 transitions. [2023-11-23 22:29:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:29:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-23 22:29:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:45,157 INFO L225 Difference]: With dead ends: 7216 [2023-11-23 22:29:45,157 INFO L226 Difference]: Without dead ends: 3935 [2023-11-23 22:29:45,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:29:45,164 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 390 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:45,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1390 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2023-11-23 22:29:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3717. [2023-11-23 22:29:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3575 states have (on average 1.484195804195804) internal successors, (5306), 3595 states have internal predecessors, (5306), 105 states have call successors, (105), 29 states have call predecessors, (105), 24 states have return successors, (126), 93 states have call predecessors, (126), 105 states have call successors, (126) [2023-11-23 22:29:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5537 transitions. [2023-11-23 22:29:45,314 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5537 transitions. Word has length 80 [2023-11-23 22:29:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:45,315 INFO L495 AbstractCegarLoop]: Abstraction has 3717 states and 5537 transitions. [2023-11-23 22:29:45,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:29:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5537 transitions. [2023-11-23 22:29:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 22:29:45,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:45,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-23 22:29:45,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:45,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_bzeroErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:45,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 279871174, now seen corresponding path program 1 times [2023-11-23 22:29:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677954552] [2023-11-23 22:29:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:45,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:45,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559231410] [2023-11-23 22:29:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:45,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:45,577 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:45,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:29:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:45,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:29:45,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:29:46,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:29:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677954552] [2023-11-23 22:29:46,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:46,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559231410] [2023-11-23 22:29:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559231410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:29:46,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:29:46,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-23 22:29:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940731654] [2023-11-23 22:29:46,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:29:46,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:29:46,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:29:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:29:46,335 INFO L87 Difference]: Start difference. First operand 3717 states and 5537 transitions. Second operand has 10 states, 9 states have (on average 17.444444444444443) internal successors, (157), 10 states have internal predecessors, (157), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 22:29:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:47,041 INFO L93 Difference]: Finished difference Result 6781 states and 10076 transitions. [2023-11-23 22:29:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:29:47,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 17.444444444444443) internal successors, (157), 10 states have internal predecessors, (157), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 88 [2023-11-23 22:29:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:47,083 INFO L225 Difference]: With dead ends: 6781 [2023-11-23 22:29:47,083 INFO L226 Difference]: Without dead ends: 6780 [2023-11-23 22:29:47,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:29:47,087 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 2069 mSDsluCounter, 4406 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2088 SdHoareTripleChecker+Valid, 4986 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:47,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2088 Valid, 4986 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:29:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6780 states. [2023-11-23 22:29:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6780 to 6349. [2023-11-23 22:29:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6349 states, 6102 states have (on average 1.4827925270403146) internal successors, (9048), 6125 states have internal predecessors, (9048), 184 states have call successors, (184), 60 states have call predecessors, (184), 50 states have return successors, (217), 164 states have call predecessors, (217), 184 states have call successors, (217) [2023-11-23 22:29:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6349 states to 6349 states and 9449 transitions. [2023-11-23 22:29:47,423 INFO L78 Accepts]: Start accepts. Automaton has 6349 states and 9449 transitions. Word has length 88 [2023-11-23 22:29:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:47,424 INFO L495 AbstractCegarLoop]: Abstraction has 6349 states and 9449 transitions. [2023-11-23 22:29:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 17.444444444444443) internal successors, (157), 10 states have internal predecessors, (157), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 22:29:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6349 states and 9449 transitions. [2023-11-23 22:29:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 22:29:47,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:47,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:47,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:29:47,648 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:47,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1613682208, now seen corresponding path program 1 times [2023-11-23 22:29:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068716293] [2023-11-23 22:29:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:47,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:47,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391431879] [2023-11-23 22:29:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:47,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:47,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:47,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:47,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:29:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:48,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:29:48,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:48,198 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 [2023-11-23 22:29:48,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:29:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:48,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068716293] [2023-11-23 22:29:48,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391431879] [2023-11-23 22:29:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391431879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:48,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:48,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:29:48,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960968883] [2023-11-23 22:29:48,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:48,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:29:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:29:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:48,424 INFO L87 Difference]: Start difference. First operand 6349 states and 9449 transitions. Second operand has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:29:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:49,014 INFO L93 Difference]: Finished difference Result 8781 states and 13079 transitions. [2023-11-23 22:29:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:29:49,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 112 [2023-11-23 22:29:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:49,076 INFO L225 Difference]: With dead ends: 8781 [2023-11-23 22:29:49,077 INFO L226 Difference]: Without dead ends: 8780 [2023-11-23 22:29:49,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:29:49,081 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 498 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:49,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1971 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:29:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8780 states. [2023-11-23 22:29:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8780 to 6348. [2023-11-23 22:29:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6102 states have (on average 1.480989839396919) internal successors, (9037), 6124 states have internal predecessors, (9037), 184 states have call successors, (184), 60 states have call predecessors, (184), 50 states have return successors, (217), 164 states have call predecessors, (217), 184 states have call successors, (217) [2023-11-23 22:29:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 9438 transitions. [2023-11-23 22:29:49,406 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 9438 transitions. Word has length 112 [2023-11-23 22:29:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:49,407 INFO L495 AbstractCegarLoop]: Abstraction has 6348 states and 9438 transitions. [2023-11-23 22:29:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:29:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 9438 transitions. [2023-11-23 22:29:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 22:29:49,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:49,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:49,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:29:49,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:49,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1515459922, now seen corresponding path program 1 times [2023-11-23 22:29:49,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:49,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129764551] [2023-11-23 22:29:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:49,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:49,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897664772] [2023-11-23 22:29:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:49,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:49,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:29:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:50,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:29:50,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:50,270 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 [2023-11-23 22:29:50,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:29:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:50,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129764551] [2023-11-23 22:29:50,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897664772] [2023-11-23 22:29:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897664772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:50,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:50,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:29:50,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748671304] [2023-11-23 22:29:50,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:50,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:29:50,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:50,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:29:50,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:50,524 INFO L87 Difference]: Start difference. First operand 6348 states and 9438 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:29:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:51,101 INFO L93 Difference]: Finished difference Result 8914 states and 13248 transitions. [2023-11-23 22:29:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:29:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 113 [2023-11-23 22:29:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:51,129 INFO L225 Difference]: With dead ends: 8914 [2023-11-23 22:29:51,130 INFO L226 Difference]: Without dead ends: 8913 [2023-11-23 22:29:51,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:29:51,134 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 489 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:51,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 2228 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:29:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8913 states. [2023-11-23 22:29:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8913 to 6481. [2023-11-23 22:29:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 6228 states have (on average 1.476718047527296) internal successors, (9197), 6250 states have internal predecessors, (9197), 191 states have call successors, (191), 60 states have call predecessors, (191), 50 states have return successors, (226), 171 states have call predecessors, (226), 191 states have call successors, (226) [2023-11-23 22:29:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 9614 transitions. [2023-11-23 22:29:51,495 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 9614 transitions. Word has length 113 [2023-11-23 22:29:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:51,495 INFO L495 AbstractCegarLoop]: Abstraction has 6481 states and 9614 transitions. [2023-11-23 22:29:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:29:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 9614 transitions. [2023-11-23 22:29:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-23 22:29:51,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:51,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:51,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:29:51,723 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:51,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1672778487, now seen corresponding path program 1 times [2023-11-23 22:29:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:51,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812568717] [2023-11-23 22:29:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:51,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403607393] [2023-11-23 22:29:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:51,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:51,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:51,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 22:29:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:52,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:29:52,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:29:52,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:52,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:52,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812568717] [2023-11-23 22:29:52,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:52,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403607393] [2023-11-23 22:29:52,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403607393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:52,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:52,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:29:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32810187] [2023-11-23 22:29:52,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:52,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:29:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:29:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:29:52,390 INFO L87 Difference]: Start difference. First operand 6481 states and 9614 transitions. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:29:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:52,808 INFO L93 Difference]: Finished difference Result 12830 states and 19036 transitions. [2023-11-23 22:29:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:29:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 118 [2023-11-23 22:29:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:52,830 INFO L225 Difference]: With dead ends: 12830 [2023-11-23 22:29:52,830 INFO L226 Difference]: Without dead ends: 6481 [2023-11-23 22:29:52,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:29:52,842 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 142 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:52,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 3458 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:29:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2023-11-23 22:29:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 6481. [2023-11-23 22:29:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 6228 states have (on average 1.4765574823378291) internal successors, (9196), 6249 states have internal predecessors, (9196), 191 states have call successors, (191), 60 states have call predecessors, (191), 50 states have return successors, (226), 171 states have call predecessors, (226), 191 states have call successors, (226) [2023-11-23 22:29:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 9613 transitions. [2023-11-23 22:29:53,235 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 9613 transitions. Word has length 118 [2023-11-23 22:29:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:53,236 INFO L495 AbstractCegarLoop]: Abstraction has 6481 states and 9613 transitions. [2023-11-23 22:29:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:29:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 9613 transitions. [2023-11-23 22:29:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 22:29:53,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:53,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:53,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:53,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:53,461 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:53,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1823061689, now seen corresponding path program 1 times [2023-11-23 22:29:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:53,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029769038] [2023-11-23 22:29:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:53,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:53,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993464487] [2023-11-23 22:29:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:53,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:53,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:53,516 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:53,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 22:29:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:54,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:29:54,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:54,052 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 [2023-11-23 22:29:54,067 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 [2023-11-23 22:29:54,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-23 22:29:54,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:29:54,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2023-11-23 22:29:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:54,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029769038] [2023-11-23 22:29:54,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993464487] [2023-11-23 22:29:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993464487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:54,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:29:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666576548] [2023-11-23 22:29:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:54,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:29:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:29:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:29:54,980 INFO L87 Difference]: Start difference. First operand 6481 states and 9613 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 10 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:29:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:58,211 INFO L93 Difference]: Finished difference Result 15352 states and 22787 transitions. [2023-11-23 22:29:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:29:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 10 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 123 [2023-11-23 22:29:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:58,239 INFO L225 Difference]: With dead ends: 15352 [2023-11-23 22:29:58,240 INFO L226 Difference]: Without dead ends: 8954 [2023-11-23 22:29:58,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:29:58,252 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 736 mSDsluCounter, 4043 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 4628 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:58,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 4628 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 22:29:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2023-11-23 22:29:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 6513. [2023-11-23 22:29:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6513 states, 6260 states have (on average 1.474920127795527) internal successors, (9233), 6281 states have internal predecessors, (9233), 191 states have call successors, (191), 60 states have call predecessors, (191), 50 states have return successors, (226), 171 states have call predecessors, (226), 191 states have call successors, (226) [2023-11-23 22:29:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6513 states to 6513 states and 9650 transitions. [2023-11-23 22:29:58,717 INFO L78 Accepts]: Start accepts. Automaton has 6513 states and 9650 transitions. Word has length 123 [2023-11-23 22:29:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:58,718 INFO L495 AbstractCegarLoop]: Abstraction has 6513 states and 9650 transitions. [2023-11-23 22:29:58,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 10 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:29:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6513 states and 9650 transitions. [2023-11-23 22:29:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 22:29:58,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:58,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:58,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:29:58,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:29:58,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash -870834501, now seen corresponding path program 1 times [2023-11-23 22:29:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:58,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428124342] [2023-11-23 22:29:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:58,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:59,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:29:59,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897952025] [2023-11-23 22:29:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:59,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:59,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 22:29:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:59,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:29:59,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:59,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:29:59,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:59,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428124342] [2023-11-23 22:29:59,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:29:59,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897952025] [2023-11-23 22:29:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897952025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:59,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:59,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:29:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737951120] [2023-11-23 22:29:59,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:59,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:29:59,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:29:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:59,668 INFO L87 Difference]: Start difference. First operand 6513 states and 9650 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:30:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:30:00,058 INFO L93 Difference]: Finished difference Result 14211 states and 21150 transitions. [2023-11-23 22:30:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:30:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 123 [2023-11-23 22:30:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:30:00,087 INFO L225 Difference]: With dead ends: 14211 [2023-11-23 22:30:00,087 INFO L226 Difference]: Without dead ends: 7801 [2023-11-23 22:30:00,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:30:00,103 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 142 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:30:00,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 2366 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:30:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2023-11-23 22:30:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6766. [2023-11-23 22:30:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6513 states have (on average 1.4593889144787349) internal successors, (9505), 6534 states have internal predecessors, (9505), 191 states have call successors, (191), 60 states have call predecessors, (191), 50 states have return successors, (226), 171 states have call predecessors, (226), 191 states have call successors, (226) [2023-11-23 22:30:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 9922 transitions. [2023-11-23 22:30:00,462 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 9922 transitions. Word has length 123 [2023-11-23 22:30:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:30:00,462 INFO L495 AbstractCegarLoop]: Abstraction has 6766 states and 9922 transitions. [2023-11-23 22:30:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:30:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 9922 transitions. [2023-11-23 22:30:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-23 22:30:00,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:30:00,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:00,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:30:00,690 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:30:00,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -984799813, now seen corresponding path program 1 times [2023-11-23 22:30:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:00,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582676706] [2023-11-23 22:30:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:00,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:30:00,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043313850] [2023-11-23 22:30:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:00,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:00,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:00,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 22:30:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:01,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 22:30:01,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:01,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:30:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582676706] [2023-11-23 22:30:01,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:30:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043313850] [2023-11-23 22:30:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043313850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:01,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:01,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:30:01,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267402607] [2023-11-23 22:30:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:01,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:30:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:30:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:30:01,454 INFO L87 Difference]: Start difference. First operand 6766 states and 9922 transitions. Second operand has 9 states, 8 states have (on average 14.25) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 22:30:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:30:01,938 INFO L93 Difference]: Finished difference Result 10876 states and 15950 transitions. [2023-11-23 22:30:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:30:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 14.25) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2023-11-23 22:30:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:30:01,954 INFO L225 Difference]: With dead ends: 10876 [2023-11-23 22:30:01,954 INFO L226 Difference]: Without dead ends: 4263 [2023-11-23 22:30:01,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:30:01,970 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 23 mSDsluCounter, 4161 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 4761 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:30:01,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 4761 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:30:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2023-11-23 22:30:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 4261. [2023-11-23 22:30:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 4084 states have (on average 1.4571498530852105) internal successors, (5951), 4103 states have internal predecessors, (5951), 119 states have call successors, (119), 50 states have call predecessors, (119), 46 states have return successors, (132), 107 states have call predecessors, (132), 119 states have call successors, (132) [2023-11-23 22:30:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6202 transitions. [2023-11-23 22:30:02,227 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6202 transitions. Word has length 124 [2023-11-23 22:30:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:30:02,228 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 6202 transitions. [2023-11-23 22:30:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 14.25) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 22:30:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6202 transitions. [2023-11-23 22:30:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-23 22:30:02,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:30:02,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:02,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:30:02,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:30:02,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 82785463, now seen corresponding path program 1 times [2023-11-23 22:30:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331450702] [2023-11-23 22:30:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:02,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:30:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710979338] [2023-11-23 22:30:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:02,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:02,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:02,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 22:30:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:03,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 22:30:03,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:30:03,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:30:03,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:03,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331450702] [2023-11-23 22:30:03,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:30:03,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710979338] [2023-11-23 22:30:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710979338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:03,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:30:03,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-23 22:30:03,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225192814] [2023-11-23 22:30:03,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:03,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:30:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:30:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:30:03,606 INFO L87 Difference]: Start difference. First operand 4261 states and 6202 transitions. Second operand has 14 states, 12 states have (on average 11.25) internal successors, (135), 14 states have internal predecessors, (135), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 22:30:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:30:04,327 INFO L93 Difference]: Finished difference Result 8427 states and 12304 transitions. [2023-11-23 22:30:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:30:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 11.25) internal successors, (135), 14 states have internal predecessors, (135), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2023-11-23 22:30:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:30:04,340 INFO L225 Difference]: With dead ends: 8427 [2023-11-23 22:30:04,340 INFO L226 Difference]: Without dead ends: 4333 [2023-11-23 22:30:04,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:30:04,349 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 48 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4771 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:30:04,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4771 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:30:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2023-11-23 22:30:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4316. [2023-11-23 22:30:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4137 states have (on average 1.4580613971476917) internal successors, (6032), 4152 states have internal predecessors, (6032), 119 states have call successors, (119), 56 states have call predecessors, (119), 48 states have return successors, (127), 107 states have call predecessors, (127), 119 states have call successors, (127) [2023-11-23 22:30:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 6278 transitions. [2023-11-23 22:30:04,534 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 6278 transitions. Word has length 126 [2023-11-23 22:30:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:30:04,535 INFO L495 AbstractCegarLoop]: Abstraction has 4316 states and 6278 transitions. [2023-11-23 22:30:04,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 11.25) internal successors, (135), 14 states have internal predecessors, (135), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 22:30:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 6278 transitions. [2023-11-23 22:30:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 22:30:04,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:30:04,537 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:04,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:04,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:04,751 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:30:04,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1067154075, now seen corresponding path program 2 times [2023-11-23 22:30:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500976982] [2023-11-23 22:30:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:04,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:30:04,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384546272] [2023-11-23 22:30:04,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:30:04,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:04,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:04,857 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:04,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 22:30:05,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:30:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:05,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:30:05,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:05,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:30:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 22:30:05,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:30:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500976982] [2023-11-23 22:30:05,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:30:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384546272] [2023-11-23 22:30:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384546272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:30:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810702429] [2023-11-23 22:30:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:30:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:30:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:30:05,377 INFO L87 Difference]: Start difference. First operand 4316 states and 6278 transitions. Second operand has 3 states, 2 states have (on average 52.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:30:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:30:05,517 INFO L93 Difference]: Finished difference Result 4316 states and 6278 transitions. [2023-11-23 22:30:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:30:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 52.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 130 [2023-11-23 22:30:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:30:05,530 INFO L225 Difference]: With dead ends: 4316 [2023-11-23 22:30:05,530 INFO L226 Difference]: Without dead ends: 4315 [2023-11-23 22:30:05,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:30:05,534 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 2 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:30:05,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1219 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:30:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2023-11-23 22:30:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4315. [2023-11-23 22:30:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4137 states have (on average 1.4566110708242688) internal successors, (6026), 4151 states have internal predecessors, (6026), 119 states have call successors, (119), 56 states have call predecessors, (119), 48 states have return successors, (127), 107 states have call predecessors, (127), 119 states have call successors, (127) [2023-11-23 22:30:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 6272 transitions. [2023-11-23 22:30:05,701 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 6272 transitions. Word has length 130 [2023-11-23 22:30:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:30:05,701 INFO L495 AbstractCegarLoop]: Abstraction has 4315 states and 6272 transitions. [2023-11-23 22:30:05,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 52.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 22:30:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 6272 transitions. [2023-11-23 22:30:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-23 22:30:05,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:30:05,704 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:05,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:05,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:05,923 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:30:05,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1277961940, now seen corresponding path program 1 times [2023-11-23 22:30:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:05,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905846296] [2023-11-23 22:30:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:05,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:30:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865495864] [2023-11-23 22:30:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:05,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:05,982 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 22:30:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:06,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:30:06,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:30:06,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 22:30:07,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905846296] [2023-11-23 22:30:07,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:30:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865495864] [2023-11-23 22:30:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865495864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:07,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:30:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2023-11-23 22:30:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436985872] [2023-11-23 22:30:07,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:07,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 22:30:07,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:30:07,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:30:07,102 INFO L87 Difference]: Start difference. First operand 4315 states and 6272 transitions. Second operand has 21 states, 19 states have (on average 7.578947368421052) internal successors, (144), 21 states have internal predecessors, (144), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 22:30:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:30:08,619 INFO L93 Difference]: Finished difference Result 8246 states and 12015 transitions. [2023-11-23 22:30:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 22:30:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.578947368421052) internal successors, (144), 21 states have internal predecessors, (144), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2023-11-23 22:30:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:30:08,635 INFO L225 Difference]: With dead ends: 8246 [2023-11-23 22:30:08,635 INFO L226 Difference]: Without dead ends: 3955 [2023-11-23 22:30:08,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1232, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 22:30:08,646 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 148 mSDsluCounter, 6631 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 7152 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:30:08,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 7152 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:30:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2023-11-23 22:30:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3932. [2023-11-23 22:30:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3754 states have (on average 1.4429941395844432) internal successors, (5417), 3768 states have internal predecessors, (5417), 119 states have call successors, (119), 56 states have call predecessors, (119), 48 states have return successors, (127), 107 states have call predecessors, (127), 119 states have call successors, (127) [2023-11-23 22:30:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 5663 transitions. [2023-11-23 22:30:08,847 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 5663 transitions. Word has length 131 [2023-11-23 22:30:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:30:08,847 INFO L495 AbstractCegarLoop]: Abstraction has 3932 states and 5663 transitions. [2023-11-23 22:30:08,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.578947368421052) internal successors, (144), 21 states have internal predecessors, (144), 3 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-23 22:30:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 5663 transitions. [2023-11-23 22:30:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-23 22:30:08,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:30:08,850 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:08,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 22:30:09,071 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2023-11-23 22:30:09,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -372127785, now seen corresponding path program 2 times [2023-11-23 22:30:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:09,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059485456] [2023-11-23 22:30:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:09,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:09,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:30:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127997609] [2023-11-23 22:30:09,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:30:09,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:09,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:09,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8245f757-bf14-4180-913b-e65668d11eae/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 22:30:13,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:30:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:13,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 22:30:13,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:13,593 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 [2023-11-23 22:30:13,614 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 [2023-11-23 22:30:13,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-23 22:30:14,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:30:14,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23