./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/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_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e277983cfe4b30513b023d34f2b840358d8a25fd7a5c39241cadd105379bfb92 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:27:15,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:27:15,305 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:27:15,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:27:15,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:27:15,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:27:15,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:27:15,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:27:15,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:27:15,368 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:27:15,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:27:15,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:27:15,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:27:15,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:27:15,372 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:27:15,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:27:15,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:27:15,373 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:27:15,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:27:15,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:27:15,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:27:15,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:27:15,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:27:15,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:27:15,376 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:27:15,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:27:15,377 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:27:15,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:27:15,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:27:15,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:27:15,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:27:15,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:15,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:27:15,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:27:15,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:27:15,381 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:27:15,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:27:15,382 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:27:15,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:27:15,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:27:15,382 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:27:15,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:27:15,383 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_836d8271-fe86-4f17-97c9-c2f04186dd12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e277983cfe4b30513b023d34f2b840358d8a25fd7a5c39241cadd105379bfb92 [2023-11-23 22:27:15,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:27:15,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:27:15,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:27:15,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:27:15,734 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:27:15,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i [2023-11-23 22:27:19,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:27:19,520 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:27:19,521 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i [2023-11-23 22:27:19,543 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/data/bd9597969/2237a9f984754b4eb29f38914c8d8864/FLAGb6cd4d4f5 [2023-11-23 22:27:19,558 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/data/bd9597969/2237a9f984754b4eb29f38914c8d8864 [2023-11-23 22:27:19,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:27:19,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:27:19,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:19,564 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:27:19,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:27:19,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:19" (1/1) ... [2023-11-23 22:27:19,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29cad7d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:19, skipping insertion in model container [2023-11-23 22:27:19,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:19" (1/1) ... [2023-11-23 22:27:19,666 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:27:19,929 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 22:27:20,115 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i[37435,37448] [2023-11-23 22:27:20,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:20,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:27:20,273 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 22:27:20,291 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test2-1.i[37435,37448] [2023-11-23 22:27:20,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:20,468 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:27:20,469 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:27:20,477 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:27:20,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20 WrapperNode [2023-11-23 22:27:20,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:20,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:20,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:27:20,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:27:20,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,636 INFO L138 Inliner]: procedures = 208, calls = 230, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1184 [2023-11-23 22:27:20,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:20,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:27:20,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:27:20,646 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:27:20,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,675 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,732 INFO L189 HeapSplitter]: Split 211 memory accesses to 5 slices as follows [0, 2, 170, 34, 5] [2023-11-23 22:27:20,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:27:20,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:27:20,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:27:20,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:27:20,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (1/1) ... [2023-11-23 22:27:20,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:20,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:20,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:27:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-23 22:27:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-23 22:27:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-23 22:27:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-23 22:27:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-23 22:27:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-23 22:27:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-23 22:27:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-23 22:27:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-23 22:27:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-23 22:27:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:27:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 22:27:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 22:27:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 22:27:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 22:27:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 22:27:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 22:27:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:27:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:27:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:27:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:27:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:27:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:27:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:27:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:27:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:27:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:27:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:27:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:27:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:27:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 22:27:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 22:27:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 22:27:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 22:27:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 22:27:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:27:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:27:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:27:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:27:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:27:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:27:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:27:21,168 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:27:21,171 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:27:22,647 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:27:22,715 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:27:22,715 INFO L309 CfgBuilder]: Removed 54 assume(true) statements. [2023-11-23 22:27:22,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:22 BoogieIcfgContainer [2023-11-23 22:27:22,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:27:22,720 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:27:22,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:27:22,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:27:22,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:19" (1/3) ... [2023-11-23 22:27:22,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603ab31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:22, skipping insertion in model container [2023-11-23 22:27:22,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:20" (2/3) ... [2023-11-23 22:27:22,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603ab31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:22, skipping insertion in model container [2023-11-23 22:27:22,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:22" (3/3) ... [2023-11-23 22:27:22,733 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_nondet_test2-1.i [2023-11-23 22:27:22,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:27:22,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:27:22,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:27:22,868 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;@43cd45ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:27:22,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:27:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 321 states, 315 states have (on average 1.7079365079365079) internal successors, (538), 316 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 22:27:22,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:22,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:22,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:22,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1018800210, now seen corresponding path program 1 times [2023-11-23 22:27:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:22,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625252137] [2023-11-23 22:27:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:22,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:23,183 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 22:27:23,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625252137] [2023-11-23 22:27:23,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625252137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:23,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:23,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:27:23,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18574320] [2023-11-23 22:27:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:23,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:27:23,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:27:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:27:23,243 INFO L87 Difference]: Start difference. First operand has 321 states, 315 states have (on average 1.7079365079365079) internal successors, (538), 316 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 22:27:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:23,390 INFO L93 Difference]: Finished difference Result 640 states and 1085 transitions. [2023-11-23 22:27:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:27:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-23 22:27:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:23,415 INFO L225 Difference]: With dead ends: 640 [2023-11-23 22:27:23,415 INFO L226 Difference]: Without dead ends: 318 [2023-11-23 22:27:23,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:27:23,430 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:23,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 481 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:27:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-23 22:27:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2023-11-23 22:27:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.5175718849840256) internal successors, (475), 313 states have internal predecessors, (475), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 481 transitions. [2023-11-23 22:27:23,511 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 481 transitions. Word has length 10 [2023-11-23 22:27:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:23,512 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 481 transitions. [2023-11-23 22:27:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 22:27:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 481 transitions. [2023-11-23 22:27:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 22:27:23,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:23,519 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] [2023-11-23 22:27:23,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:27:23,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:23,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1228138869, now seen corresponding path program 1 times [2023-11-23 22:27:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990713957] [2023-11-23 22:27:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:23,977 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 22:27:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990713957] [2023-11-23 22:27:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990713957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:23,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:23,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108638207] [2023-11-23 22:27:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:23,983 INFO L87 Difference]: Start difference. First operand 318 states and 481 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:27:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:24,152 INFO L93 Difference]: Finished difference Result 461 states and 699 transitions. [2023-11-23 22:27:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2023-11-23 22:27:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:24,156 INFO L225 Difference]: With dead ends: 461 [2023-11-23 22:27:24,156 INFO L226 Difference]: Without dead ends: 322 [2023-11-23 22:27:24,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:27:24,159 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 165 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:24,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1201 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:27:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-23 22:27:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2023-11-23 22:27:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.4952076677316295) internal successors, (468), 313 states have internal predecessors, (468), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 474 transitions. [2023-11-23 22:27:24,181 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 474 transitions. Word has length 65 [2023-11-23 22:27:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:24,181 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 474 transitions. [2023-11-23 22:27:24,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:27:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 474 transitions. [2023-11-23 22:27:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 22:27:24,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:24,186 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] [2023-11-23 22:27:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:27:24,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:24,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash 591979393, now seen corresponding path program 1 times [2023-11-23 22:27:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:24,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478852299] [2023-11-23 22:27:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:24,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:24,920 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 22:27:24,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:24,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478852299] [2023-11-23 22:27:24,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478852299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:24,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:27:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217505145] [2023-11-23 22:27:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:24,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:27:24,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:27:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:27:24,927 INFO L87 Difference]: Start difference. First operand 318 states and 474 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:27:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:25,202 INFO L93 Difference]: Finished difference Result 772 states and 1152 transitions. [2023-11-23 22:27:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2023-11-23 22:27:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:25,208 INFO L225 Difference]: With dead ends: 772 [2023-11-23 22:27:25,208 INFO L226 Difference]: Without dead ends: 630 [2023-11-23 22:27:25,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:27:25,216 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 460 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 2935 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:25,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 2935 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:27:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-11-23 22:27:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 320. [2023-11-23 22:27:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.492063492063492) internal successors, (470), 315 states have internal predecessors, (470), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 476 transitions. [2023-11-23 22:27:25,255 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 476 transitions. Word has length 65 [2023-11-23 22:27:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:25,255 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 476 transitions. [2023-11-23 22:27:25,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 22:27:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 476 transitions. [2023-11-23 22:27:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-23 22:27:25,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:25,265 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:25,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:27:25,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:25,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1149655213, now seen corresponding path program 1 times [2023-11-23 22:27:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:25,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235876193] [2023-11-23 22:27:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:25,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:25,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299438673] [2023-11-23 22:27:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:25,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:25,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:27:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:25,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:27:25,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:25,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235876193] [2023-11-23 22:27:25,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299438673] [2023-11-23 22:27:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299438673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:25,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987548110] [2023-11-23 22:27:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:25,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:25,760 INFO L87 Difference]: Start difference. First operand 320 states and 476 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:25,867 INFO L93 Difference]: Finished difference Result 657 states and 979 transitions. [2023-11-23 22:27:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:25,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2023-11-23 22:27:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:25,871 INFO L225 Difference]: With dead ends: 657 [2023-11-23 22:27:25,871 INFO L226 Difference]: Without dead ends: 341 [2023-11-23 22:27:25,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 22:27:25,879 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 9 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:25,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 888 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:27:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-23 22:27:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2023-11-23 22:27:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.462686567164179) internal successors, (490), 335 states have internal predecessors, (490), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 496 transitions. [2023-11-23 22:27:25,897 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 496 transitions. Word has length 141 [2023-11-23 22:27:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:25,899 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 496 transitions. [2023-11-23 22:27:25,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 496 transitions. [2023-11-23 22:27:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-23 22:27:25,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:25,903 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:25,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:26,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:26,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:26,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1107957169, now seen corresponding path program 1 times [2023-11-23 22:27:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689067930] [2023-11-23 22:27:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:26,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:26,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139475756] [2023-11-23 22:27:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:26,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:26,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:26,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:26,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:27:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:26,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:27:26,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:26,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:26,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689067930] [2023-11-23 22:27:26,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139475756] [2023-11-23 22:27:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139475756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:26,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:26,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592718619] [2023-11-23 22:27:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:26,602 INFO L87 Difference]: Start difference. First operand 340 states and 496 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:26,692 INFO L93 Difference]: Finished difference Result 663 states and 975 transitions. [2023-11-23 22:27:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2023-11-23 22:27:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:26,695 INFO L225 Difference]: With dead ends: 663 [2023-11-23 22:27:26,696 INFO L226 Difference]: Without dead ends: 327 [2023-11-23 22:27:26,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 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 22:27:26,697 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 165 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:26,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1180 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:27:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-23 22:27:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2023-11-23 22:27:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.4610591900311527) internal successors, (469), 321 states have internal predecessors, (469), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 475 transitions. [2023-11-23 22:27:26,710 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 475 transitions. Word has length 141 [2023-11-23 22:27:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:26,710 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 475 transitions. [2023-11-23 22:27:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 475 transitions. [2023-11-23 22:27:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-23 22:27:26,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:26,713 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:26,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 22:27:26,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:26,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:26,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1025172707, now seen corresponding path program 1 times [2023-11-23 22:27:26,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:26,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697015281] [2023-11-23 22:27:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:26,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:26,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:26,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202547297] [2023-11-23 22:27:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:26,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:27,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:27:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:27,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:27,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:27,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697015281] [2023-11-23 22:27:27,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202547297] [2023-11-23 22:27:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202547297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:27:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057945197] [2023-11-23 22:27:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:27,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:27,646 INFO L87 Difference]: Start difference. First operand 326 states and 475 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:27,737 INFO L93 Difference]: Finished difference Result 884 states and 1302 transitions. [2023-11-23 22:27:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2023-11-23 22:27:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:27,742 INFO L225 Difference]: With dead ends: 884 [2023-11-23 22:27:27,743 INFO L226 Difference]: Without dead ends: 562 [2023-11-23 22:27:27,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 22:27:27,745 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 300 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:27,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1074 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:27:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-23 22:27:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 560. [2023-11-23 22:27:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.481081081081081) internal successors, (822), 555 states have internal predecessors, (822), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 828 transitions. [2023-11-23 22:27:27,771 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 828 transitions. Word has length 141 [2023-11-23 22:27:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:27,772 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 828 transitions. [2023-11-23 22:27:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 22:27:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 828 transitions. [2023-11-23 22:27:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-23 22:27:27,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:27,776 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:27,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:27,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:27:27,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:27,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -127994518, now seen corresponding path program 1 times [2023-11-23 22:27:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:28,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565724547] [2023-11-23 22:27:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:28,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:28,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908516307] [2023-11-23 22:27:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:28,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:28,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:28,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:28,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:27:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:28,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:28,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:28,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565724547] [2023-11-23 22:27:28,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908516307] [2023-11-23 22:27:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908516307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:28,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650502117] [2023-11-23 22:27:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:28,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:28,738 INFO L87 Difference]: Start difference. First operand 560 states and 828 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:29,007 INFO L93 Difference]: Finished difference Result 882 states and 1299 transitions. [2023-11-23 22:27:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 154 [2023-11-23 22:27:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:29,012 INFO L225 Difference]: With dead ends: 882 [2023-11-23 22:27:29,012 INFO L226 Difference]: Without dead ends: 443 [2023-11-23 22:27:29,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 22:27:29,014 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 767 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:29,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 777 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:27:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-23 22:27:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2023-11-23 22:27:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.4680365296803652) internal successors, (643), 438 states have internal predecessors, (643), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 649 transitions. [2023-11-23 22:27:29,033 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 649 transitions. Word has length 154 [2023-11-23 22:27:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:29,034 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 649 transitions. [2023-11-23 22:27:29,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 649 transitions. [2023-11-23 22:27:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-23 22:27:29,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:29,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:29,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:27:29,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1793001559, now seen corresponding path program 1 times [2023-11-23 22:27:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133188848] [2023-11-23 22:27:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:29,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423916148] [2023-11-23 22:27:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:29,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:29,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:29,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:29,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:27:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:29,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 22:27:29,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:29,841 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 22:27:30,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:27:30,188 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 22:27:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:30,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133188848] [2023-11-23 22:27:30,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423916148] [2023-11-23 22:27:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423916148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:30,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:27:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573338450] [2023-11-23 22:27:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:30,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:27:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:27:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:27:30,393 INFO L87 Difference]: Start difference. First operand 443 states and 649 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:31,514 INFO L93 Difference]: Finished difference Result 823 states and 1197 transitions. [2023-11-23 22:27:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:27:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2023-11-23 22:27:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:31,520 INFO L225 Difference]: With dead ends: 823 [2023-11-23 22:27:31,521 INFO L226 Difference]: Without dead ends: 684 [2023-11-23 22:27:31,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:27:31,522 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 535 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:31,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 2038 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:27:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-11-23 22:27:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 482. [2023-11-23 22:27:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 477 states have (on average 1.448637316561845) internal successors, (691), 477 states have internal predecessors, (691), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 697 transitions. [2023-11-23 22:27:31,550 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 697 transitions. Word has length 164 [2023-11-23 22:27:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:31,551 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 697 transitions. [2023-11-23 22:27:31,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 697 transitions. [2023-11-23 22:27:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-23 22:27:31,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:31,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:31,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:31,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1439913177, now seen corresponding path program 1 times [2023-11-23 22:27:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457423051] [2023-11-23 22:27:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:31,837 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:31,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935455279] [2023-11-23 22:27:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:31,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:31,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:27:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:32,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:27:32,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:32,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:32,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457423051] [2023-11-23 22:27:32,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935455279] [2023-11-23 22:27:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935455279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:32,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:32,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787614279] [2023-11-23 22:27:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:32,276 INFO L87 Difference]: Start difference. First operand 482 states and 697 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:32,353 INFO L93 Difference]: Finished difference Result 640 states and 929 transitions. [2023-11-23 22:27:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2023-11-23 22:27:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:32,358 INFO L225 Difference]: With dead ends: 640 [2023-11-23 22:27:32,358 INFO L226 Difference]: Without dead ends: 492 [2023-11-23 22:27:32,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 162 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 22:27:32,362 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 3 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:32,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 893 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:27:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-23 22:27:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 486. [2023-11-23 22:27:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.4365904365904365) internal successors, (691), 481 states have internal predecessors, (691), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 697 transitions. [2023-11-23 22:27:32,391 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 697 transitions. Word has length 164 [2023-11-23 22:27:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:32,392 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 697 transitions. [2023-11-23 22:27:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 697 transitions. [2023-11-23 22:27:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-23 22:27:32,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:32,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:32,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:32,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:32,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:32,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1777482841, now seen corresponding path program 1 times [2023-11-23 22:27:32,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:32,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515238549] [2023-11-23 22:27:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:32,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:32,714 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973981621] [2023-11-23 22:27:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:32,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:32,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:32,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:27:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:33,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:27:33,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:33,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515238549] [2023-11-23 22:27:33,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973981621] [2023-11-23 22:27:33,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973981621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:33,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473008461] [2023-11-23 22:27:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:33,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:33,248 INFO L87 Difference]: Start difference. First operand 486 states and 697 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:33,328 INFO L93 Difference]: Finished difference Result 589 states and 837 transitions. [2023-11-23 22:27:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2023-11-23 22:27:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:33,332 INFO L225 Difference]: With dead ends: 589 [2023-11-23 22:27:33,332 INFO L226 Difference]: Without dead ends: 435 [2023-11-23 22:27:33,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 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 22:27:33,334 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 78 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:33,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1045 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:27:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-23 22:27:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2023-11-23 22:27:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.4023255813953488) internal successors, (603), 430 states have internal predecessors, (603), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 609 transitions. [2023-11-23 22:27:33,357 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 609 transitions. Word has length 164 [2023-11-23 22:27:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:33,358 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 609 transitions. [2023-11-23 22:27:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 609 transitions. [2023-11-23 22:27:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-23 22:27:33,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:33,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:33,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:33,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:27:33,582 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 786107972, now seen corresponding path program 1 times [2023-11-23 22:27:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:33,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361026705] [2023-11-23 22:27:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:33,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:33,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665856757] [2023-11-23 22:27:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:33,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:27:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:34,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 22:27:34,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:34,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:34,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361026705] [2023-11-23 22:27:34,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:34,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665856757] [2023-11-23 22:27:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665856757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:34,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:34,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:27:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161980748] [2023-11-23 22:27:34,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:34,323 INFO L87 Difference]: Start difference. First operand 435 states and 609 transitions. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:34,731 INFO L93 Difference]: Finished difference Result 868 states and 1203 transitions. [2023-11-23 22:27:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-23 22:27:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:34,735 INFO L225 Difference]: With dead ends: 868 [2023-11-23 22:27:34,735 INFO L226 Difference]: Without dead ends: 515 [2023-11-23 22:27:34,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:34,737 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 12 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:34,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1244 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:27:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-23 22:27:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 509. [2023-11-23 22:27:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 504 states have (on average 1.371031746031746) internal successors, (691), 504 states have internal predecessors, (691), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 697 transitions. [2023-11-23 22:27:34,761 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 697 transitions. Word has length 165 [2023-11-23 22:27:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:34,762 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 697 transitions. [2023-11-23 22:27:34,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 697 transitions. [2023-11-23 22:27:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 22:27:34,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:34,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:34,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:34,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:34,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1204128653, now seen corresponding path program 1 times [2023-11-23 22:27:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211669654] [2023-11-23 22:27:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:35,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:35,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889966000] [2023-11-23 22:27:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:35,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:35,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:27:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:35,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:27:35,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:35,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:35,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211669654] [2023-11-23 22:27:35,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889966000] [2023-11-23 22:27:35,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889966000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:35,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:35,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:27:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299903522] [2023-11-23 22:27:35,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:35,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:27:35,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:27:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:27:35,740 INFO L87 Difference]: Start difference. First operand 509 states and 697 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:36,376 INFO L93 Difference]: Finished difference Result 913 states and 1255 transitions. [2023-11-23 22:27:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-23 22:27:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:36,381 INFO L225 Difference]: With dead ends: 913 [2023-11-23 22:27:36,381 INFO L226 Difference]: Without dead ends: 531 [2023-11-23 22:27:36,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:36,383 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 17 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:36,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1707 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:27:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-23 22:27:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 525. [2023-11-23 22:27:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.375) internal successors, (715), 520 states have internal predecessors, (715), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 721 transitions. [2023-11-23 22:27:36,415 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 721 transitions. Word has length 166 [2023-11-23 22:27:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:36,416 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 721 transitions. [2023-11-23 22:27:36,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 721 transitions. [2023-11-23 22:27:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 22:27:36,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:36,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:36,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:36,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:36,637 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:36,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash 475909263, now seen corresponding path program 1 times [2023-11-23 22:27:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440778273] [2023-11-23 22:27:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:36,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:36,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:36,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483152912] [2023-11-23 22:27:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:36,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:36,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:36,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:27:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:37,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 22:27:37,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:37,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440778273] [2023-11-23 22:27:37,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:37,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483152912] [2023-11-23 22:27:37,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483152912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:37,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:27:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042288591] [2023-11-23 22:27:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:37,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:27:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:27:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:27:37,427 INFO L87 Difference]: Start difference. First operand 525 states and 721 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:38,180 INFO L93 Difference]: Finished difference Result 943 states and 1298 transitions. [2023-11-23 22:27:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:27:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-23 22:27:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:38,184 INFO L225 Difference]: With dead ends: 943 [2023-11-23 22:27:38,184 INFO L226 Difference]: Without dead ends: 549 [2023-11-23 22:27:38,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:27:38,186 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 26 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:38,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2352 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:27:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-11-23 22:27:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 539. [2023-11-23 22:27:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.3726591760299625) internal successors, (733), 534 states have internal predecessors, (733), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 739 transitions. [2023-11-23 22:27:38,211 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 739 transitions. Word has length 167 [2023-11-23 22:27:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:38,211 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 739 transitions. [2023-11-23 22:27:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 739 transitions. [2023-11-23 22:27:38,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 22:27:38,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:38,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:38,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:38,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:27:38,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:38,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1795136469, now seen corresponding path program 1 times [2023-11-23 22:27:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:38,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304842156] [2023-11-23 22:27:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:38,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:38,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:38,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226146867] [2023-11-23 22:27:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:38,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:38,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:38,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:27:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:39,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 22:27:39,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:39,058 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 22:27:39,080 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 16 treesize of output 17 [2023-11-23 22:27:39,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:27:39,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 26 [2023-11-23 22:27:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:39,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304842156] [2023-11-23 22:27:39,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226146867] [2023-11-23 22:27:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226146867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:39,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:39,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:27:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595130874] [2023-11-23 22:27:39,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:27:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:27:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:27:39,696 INFO L87 Difference]: Start difference. First operand 539 states and 739 transitions. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:41,233 INFO L93 Difference]: Finished difference Result 1080 states and 1484 transitions. [2023-11-23 22:27:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:27:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-23 22:27:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:41,239 INFO L225 Difference]: With dead ends: 1080 [2023-11-23 22:27:41,239 INFO L226 Difference]: Without dead ends: 671 [2023-11-23 22:27:41,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:27:41,241 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 635 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:41,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1895 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 22:27:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-11-23 22:27:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 546. [2023-11-23 22:27:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 541 states have (on average 1.3678373382624769) internal successors, (740), 541 states have internal predecessors, (740), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 746 transitions. [2023-11-23 22:27:41,272 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 746 transitions. Word has length 167 [2023-11-23 22:27:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:41,273 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 746 transitions. [2023-11-23 22:27:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 746 transitions. [2023-11-23 22:27:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 22:27:41,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:41,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:41,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:41,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:27:41,490 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:41,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1973067383, now seen corresponding path program 1 times [2023-11-23 22:27:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:41,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150005696] [2023-11-23 22:27:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:41,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375027095] [2023-11-23 22:27:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:41,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:41,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:27:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:42,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:27:42,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:42,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150005696] [2023-11-23 22:27:42,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375027095] [2023-11-23 22:27:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375027095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:42,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:42,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:27:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360594897] [2023-11-23 22:27:42,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:42,203 INFO L87 Difference]: Start difference. First operand 546 states and 746 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:42,617 INFO L93 Difference]: Finished difference Result 650 states and 887 transitions. [2023-11-23 22:27:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-23 22:27:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:42,621 INFO L225 Difference]: With dead ends: 650 [2023-11-23 22:27:42,622 INFO L226 Difference]: Without dead ends: 550 [2023-11-23 22:27:42,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:42,623 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 26 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:42,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1598 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:27:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-23 22:27:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 546. [2023-11-23 22:27:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 541 states have (on average 1.365988909426987) internal successors, (739), 541 states have internal predecessors, (739), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 745 transitions. [2023-11-23 22:27:42,649 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 745 transitions. Word has length 167 [2023-11-23 22:27:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:42,650 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 745 transitions. [2023-11-23 22:27:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 745 transitions. [2023-11-23 22:27:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 22:27:42,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:42,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:42,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:27:42,868 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:42,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1279946835, now seen corresponding path program 1 times [2023-11-23 22:27:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203738536] [2023-11-23 22:27:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:42,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:42,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808849516] [2023-11-23 22:27:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:42,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:27:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:43,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:27:43,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:27:43,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203738536] [2023-11-23 22:27:43,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808849516] [2023-11-23 22:27:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808849516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:43,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:43,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:27:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141654043] [2023-11-23 22:27:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:43,729 INFO L87 Difference]: Start difference. First operand 546 states and 745 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:44,184 INFO L93 Difference]: Finished difference Result 959 states and 1312 transitions. [2023-11-23 22:27:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-23 22:27:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:44,188 INFO L225 Difference]: With dead ends: 959 [2023-11-23 22:27:44,188 INFO L226 Difference]: Without dead ends: 558 [2023-11-23 22:27:44,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:44,190 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 10 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:44,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1484 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:27:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-11-23 22:27:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 554. [2023-11-23 22:27:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 549 states have (on average 1.3642987249544627) internal successors, (749), 549 states have internal predecessors, (749), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 755 transitions. [2023-11-23 22:27:44,215 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 755 transitions. Word has length 168 [2023-11-23 22:27:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:44,215 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 755 transitions. [2023-11-23 22:27:44,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 755 transitions. [2023-11-23 22:27:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 22:27:44,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:44,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:44,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:44,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:27:44,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:44,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash -991127445, now seen corresponding path program 1 times [2023-11-23 22:27:44,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:44,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230865298] [2023-11-23 22:27:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:44,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:44,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021785421] [2023-11-23 22:27:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:44,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 22:27:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:45,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:27:45,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:45,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:45,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:45,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230865298] [2023-11-23 22:27:45,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:45,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021785421] [2023-11-23 22:27:45,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021785421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:45,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:27:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189456927] [2023-11-23 22:27:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:45,364 INFO L87 Difference]: Start difference. First operand 554 states and 755 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:45,603 INFO L93 Difference]: Finished difference Result 659 states and 897 transitions. [2023-11-23 22:27:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-23 22:27:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:45,610 INFO L225 Difference]: With dead ends: 659 [2023-11-23 22:27:45,610 INFO L226 Difference]: Without dead ends: 559 [2023-11-23 22:27:45,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:27:45,612 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 6 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:45,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1374 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:27:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-23 22:27:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 558. [2023-11-23 22:27:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 553 states have (on average 1.3634719710669079) internal successors, (754), 553 states have internal predecessors, (754), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 760 transitions. [2023-11-23 22:27:45,644 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 760 transitions. Word has length 168 [2023-11-23 22:27:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:45,644 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 760 transitions. [2023-11-23 22:27:45,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 760 transitions. [2023-11-23 22:27:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 22:27:45,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:45,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:45,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:45,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:27:45,873 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:45,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1932032553, now seen corresponding path program 1 times [2023-11-23 22:27:45,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:45,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799401850] [2023-11-23 22:27:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:45,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:45,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447744404] [2023-11-23 22:27:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:45,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:45,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:45,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:45,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 22:27:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:46,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 22:27:46,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:47,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:47,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:47,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799401850] [2023-11-23 22:27:47,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:47,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447744404] [2023-11-23 22:27:47,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447744404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:47,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:47,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:27:47,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835357216] [2023-11-23 22:27:47,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:47,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:27:47,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:47,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:27:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:27:47,073 INFO L87 Difference]: Start difference. First operand 558 states and 760 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:47,498 INFO L93 Difference]: Finished difference Result 667 states and 907 transitions. [2023-11-23 22:27:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:47,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-23 22:27:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:47,504 INFO L225 Difference]: With dead ends: 667 [2023-11-23 22:27:47,504 INFO L226 Difference]: Without dead ends: 563 [2023-11-23 22:27:47,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:47,506 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 12 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:47,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1967 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:27:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-11-23 22:27:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 562. [2023-11-23 22:27:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 557 states have (on average 1.362657091561939) internal successors, (759), 557 states have internal predecessors, (759), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 765 transitions. [2023-11-23 22:27:47,537 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 765 transitions. Word has length 168 [2023-11-23 22:27:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 765 transitions. [2023-11-23 22:27:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 765 transitions. [2023-11-23 22:27:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-23 22:27:47,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:47,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:47,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:47,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:27:47,751 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:47,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash -521239067, now seen corresponding path program 1 times [2023-11-23 22:27:47,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:47,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952371879] [2023-11-23 22:27:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:47,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:47,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373746984] [2023-11-23 22:27:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:47,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:47,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:47,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 22:27:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:48,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:27:48,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:48,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952371879] [2023-11-23 22:27:48,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373746984] [2023-11-23 22:27:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373746984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:48,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:48,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:27:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118544810] [2023-11-23 22:27:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:27:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:27:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:27:48,673 INFO L87 Difference]: Start difference. First operand 562 states and 765 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:49,007 INFO L93 Difference]: Finished difference Result 675 states and 917 transitions. [2023-11-23 22:27:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-11-23 22:27:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:49,013 INFO L225 Difference]: With dead ends: 675 [2023-11-23 22:27:49,013 INFO L226 Difference]: Without dead ends: 567 [2023-11-23 22:27:49,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:49,014 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 11 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:49,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1972 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:27:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-11-23 22:27:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 562. [2023-11-23 22:27:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 557 states have (on average 1.362657091561939) internal successors, (759), 557 states have internal predecessors, (759), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 765 transitions. [2023-11-23 22:27:49,040 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 765 transitions. Word has length 169 [2023-11-23 22:27:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:49,041 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 765 transitions. [2023-11-23 22:27:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 765 transitions. [2023-11-23 22:27:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-23 22:27:49,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:49,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:49,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:49,260 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:49,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2073537116, now seen corresponding path program 1 times [2023-11-23 22:27:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058545553] [2023-11-23 22:27:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:49,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:49,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36807864] [2023-11-23 22:27:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:49,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:49,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:49,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 22:27:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:49,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 22:27:49,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:50,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058545553] [2023-11-23 22:27:50,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36807864] [2023-11-23 22:27:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36807864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:50,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:50,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:27:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925427923] [2023-11-23 22:27:50,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:27:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:27:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:27:50,092 INFO L87 Difference]: Start difference. First operand 562 states and 765 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:50,474 INFO L93 Difference]: Finished difference Result 675 states and 917 transitions. [2023-11-23 22:27:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-11-23 22:27:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:50,478 INFO L225 Difference]: With dead ends: 675 [2023-11-23 22:27:50,479 INFO L226 Difference]: Without dead ends: 567 [2023-11-23 22:27:50,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:50,480 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 17 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:50,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1976 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:27:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-11-23 22:27:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 564. [2023-11-23 22:27:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 559 states have (on average 1.3613595706618962) internal successors, (761), 559 states have internal predecessors, (761), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 767 transitions. [2023-11-23 22:27:50,510 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 767 transitions. Word has length 169 [2023-11-23 22:27:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:50,511 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 767 transitions. [2023-11-23 22:27:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 767 transitions. [2023-11-23 22:27:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 22:27:50,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:50,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:50,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:50,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:50,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:50,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash -294875132, now seen corresponding path program 1 times [2023-11-23 22:27:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:50,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453366898] [2023-11-23 22:27:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:50,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:50,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:50,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924708027] [2023-11-23 22:27:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:50,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:50,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 22:27:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:51,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:51,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:51,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453366898] [2023-11-23 22:27:51,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924708027] [2023-11-23 22:27:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924708027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086570014] [2023-11-23 22:27:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:51,639 INFO L87 Difference]: Start difference. First operand 564 states and 767 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:51,739 INFO L93 Difference]: Finished difference Result 679 states and 919 transitions. [2023-11-23 22:27:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-11-23 22:27:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:51,744 INFO L225 Difference]: With dead ends: 679 [2023-11-23 22:27:51,744 INFO L226 Difference]: Without dead ends: 569 [2023-11-23 22:27:51,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:51,746 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 6 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:51,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1130 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:27:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-11-23 22:27:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 563. [2023-11-23 22:27:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.3602150537634408) internal successors, (759), 558 states have internal predecessors, (759), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:27:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 765 transitions. [2023-11-23 22:27:51,773 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 765 transitions. Word has length 170 [2023-11-23 22:27:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:27:51,774 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 765 transitions. [2023-11-23 22:27:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 765 transitions. [2023-11-23 22:27:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 22:27:51,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:27:51,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:51,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 22:27:52,005 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:27:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1546491842, now seen corresponding path program 1 times [2023-11-23 22:27:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651702469] [2023-11-23 22:27:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:52,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:27:52,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239774537] [2023-11-23 22:27:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:52,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:52,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:52,082 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:52,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 22:27:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:52,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 22:27:52,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:27:53,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651702469] [2023-11-23 22:27:53,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:27:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239774537] [2023-11-23 22:27:53,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239774537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:53,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:27:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448271998] [2023-11-23 22:27:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:27:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:27:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:27:53,563 INFO L87 Difference]: Start difference. First operand 563 states and 765 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:27:55,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 22:27:58,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:27:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:27:59,993 INFO L93 Difference]: Finished difference Result 677 states and 915 transitions. [2023-11-23 22:27:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-11-23 22:27:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:27:59,997 INFO L225 Difference]: With dead ends: 677 [2023-11-23 22:27:59,997 INFO L226 Difference]: Without dead ends: 568 [2023-11-23 22:27:59,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:27:59,999 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 11 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:27:59,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3248 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 663 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2023-11-23 22:28:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-11-23 22:28:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 566. [2023-11-23 22:28:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 561 states have (on average 1.358288770053476) internal successors, (762), 561 states have internal predecessors, (762), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:28:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 768 transitions. [2023-11-23 22:28:00,023 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 768 transitions. Word has length 170 [2023-11-23 22:28:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:00,024 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 768 transitions. [2023-11-23 22:28:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 768 transitions. [2023-11-23 22:28:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 22:28:00,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:00,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:00,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-23 22:28:00,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-23 22:28:00,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:00,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:00,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1362556126, now seen corresponding path program 1 times [2023-11-23 22:28:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:00,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629257345] [2023-11-23 22:28:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:00,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:00,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:28:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654899606] [2023-11-23 22:28:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:00,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 22:28:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:03,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:28:03,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:03,117 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 22:28:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:03,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:28:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629257345] [2023-11-23 22:28:03,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:28:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654899606] [2023-11-23 22:28:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654899606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:28:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601549078] [2023-11-23 22:28:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:28:03,175 INFO L87 Difference]: Start difference. First operand 566 states and 768 transitions. Second operand has 6 states, 5 states have (on average 33.2) internal successors, (166), 6 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:03,325 INFO L93 Difference]: Finished difference Result 996 states and 1348 transitions. [2023-11-23 22:28:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 33.2) internal successors, (166), 6 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 170 [2023-11-23 22:28:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:03,332 INFO L225 Difference]: With dead ends: 996 [2023-11-23 22:28:03,332 INFO L226 Difference]: Without dead ends: 617 [2023-11-23 22:28:03,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:28:03,334 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 244 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:03,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1893 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:28:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-11-23 22:28:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 568. [2023-11-23 22:28:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.3594306049822065) internal successors, (764), 563 states have internal predecessors, (764), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 22:28:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 771 transitions. [2023-11-23 22:28:03,389 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 771 transitions. Word has length 170 [2023-11-23 22:28:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:03,390 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 771 transitions. [2023-11-23 22:28:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 33.2) internal successors, (166), 6 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 771 transitions. [2023-11-23 22:28:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 22:28:03,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:03,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:03,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 22:28:03,611 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:03,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1930051216, now seen corresponding path program 1 times [2023-11-23 22:28:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:03,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738265892] [2023-11-23 22:28:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:03,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:28:03,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875262084] [2023-11-23 22:28:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:03,693 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:03,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 22:28:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:05,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 22:28:05,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:05,198 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 11 treesize of output 7 [2023-11-23 22:28:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:28:05,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:28:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:05,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738265892] [2023-11-23 22:28:05,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:28:05,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875262084] [2023-11-23 22:28:05,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875262084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:05,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:28:05,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-23 22:28:05,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291563969] [2023-11-23 22:28:05,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:28:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:28:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:28:05,491 INFO L87 Difference]: Start difference. First operand 568 states and 771 transitions. Second operand has 10 states, 8 states have (on average 22.125) internal successors, (177), 10 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:28:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:05,880 INFO L93 Difference]: Finished difference Result 1007 states and 1367 transitions. [2023-11-23 22:28:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:28:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 22.125) internal successors, (177), 10 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 172 [2023-11-23 22:28:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:05,887 INFO L225 Difference]: With dead ends: 1007 [2023-11-23 22:28:05,887 INFO L226 Difference]: Without dead ends: 625 [2023-11-23 22:28:05,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:28:05,890 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 249 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:05,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 3028 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-11-23 22:28:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 576. [2023-11-23 22:28:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 569 states have (on average 1.3620386643233744) internal successors, (775), 570 states have internal predecessors, (775), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 22:28:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 782 transitions. [2023-11-23 22:28:05,929 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 782 transitions. Word has length 172 [2023-11-23 22:28:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:05,929 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 782 transitions. [2023-11-23 22:28:05,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 22.125) internal successors, (177), 10 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:28:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 782 transitions. [2023-11-23 22:28:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-23 22:28:05,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:05,933 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:05,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:06,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:06,148 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:06,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash -278293470, now seen corresponding path program 2 times [2023-11-23 22:28:06,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:06,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870202476] [2023-11-23 22:28:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:06,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:06,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:28:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107955741] [2023-11-23 22:28:06,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:28:06,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:06,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:06,213 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:06,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836d8271-fe86-4f17-97c9-c2f04186dd12/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 22:28:07,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:28:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:28:07,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:28:07,638 INFO L285 TraceCheckSpWp]: Computing forward predicates...