./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu --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 470d7065e9fd450e98d72326ef313763cf0710ea45f0a443b018e8a49bdf7927 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:40,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:40,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:40,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:40,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:40,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:40,379 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:40,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:40,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:40,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:40,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:40,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:40,384 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:40,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:40,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:40,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:40,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:40,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:40,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:40,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:40,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:40,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:40,396 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:40,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:40,397 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:40,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:40,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:40,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:40,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:40,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:40,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:40,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:40,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:40,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:40,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:40,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:40,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:40,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:40,402 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:40,402 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_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 470d7065e9fd450e98d72326ef313763cf0710ea45f0a443b018e8a49bdf7927 [2023-11-19 08:01:40,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:40,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:40,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:40,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:40,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:40,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i [2023-11-19 08:01:43,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:44,298 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:44,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i [2023-11-19 08:01:44,335 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/data/5cf9ca285/c4fab9d084464d95a7d092f0cbf76663/FLAG988145a74 [2023-11-19 08:01:44,352 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/data/5cf9ca285/c4fab9d084464d95a7d092f0cbf76663 [2023-11-19 08:01:44,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:44,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:44,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:44,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:44,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:44,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:44" (1/1) ... [2023-11-19 08:01:44,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63580e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:44, skipping insertion in model container [2023-11-19 08:01:44,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:44" (1/1) ... [2023-11-19 08:01:44,468 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:44,947 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_72d6f68a-38aa-4cba-9aaa-5fccf4611578/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i[33021,33034] [2023-11-19 08:01:45,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:45,114 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:45,162 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_72d6f68a-38aa-4cba-9aaa-5fccf4611578/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i[33021,33034] [2023-11-19 08:01:45,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:45,346 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:45,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45 WrapperNode [2023-11-19 08:01:45,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:45,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:45,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:45,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:45,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,483 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-19 08:01:45,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:45,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:45,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:45,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:45,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:45,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:45,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:45,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:45,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (1/1) ... [2023-11-19 08:01:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:45,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:45,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:01:45,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:01:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 08:01:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 08:01:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:01:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:01:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:01:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:45,935 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:45,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:46,984 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:46,998 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:46,998 INFO L302 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-19 08:01:47,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:47 BoogieIcfgContainer [2023-11-19 08:01:47,009 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:47,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:47,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:47,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:47,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:44" (1/3) ... [2023-11-19 08:01:47,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd4ab97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:47, skipping insertion in model container [2023-11-19 08:01:47,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:45" (2/3) ... [2023-11-19 08:01:47,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd4ab97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:47, skipping insertion in model container [2023-11-19 08:01:47,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:47" (3/3) ... [2023-11-19 08:01:47,022 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test1-1.i [2023-11-19 08:01:47,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:47,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:47,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:47,111 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;@5e32dabb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:47,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:01:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 08:01:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 08:01:47,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:47,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:47,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:47,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1530581310, now seen corresponding path program 1 times [2023-11-19 08:01:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:47,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708834657] [2023-11-19 08:01:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:47,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708834657] [2023-11-19 08:01:47,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708834657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:47,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:47,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325944739] [2023-11-19 08:01:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:47,376 INFO L87 Difference]: Start difference. First operand has 213 states, 196 states have (on average 1.683673469387755) internal successors, (330), 207 states have internal predecessors, (330), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:47,478 INFO L93 Difference]: Finished difference Result 596 states and 1014 transitions. [2023-11-19 08:01:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 08:01:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:47,499 INFO L225 Difference]: With dead ends: 596 [2023-11-19 08:01:47,499 INFO L226 Difference]: Without dead ends: 381 [2023-11-19 08:01:47,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:47,515 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 252 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:47,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 631 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-19 08:01:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 210. [2023-11-19 08:01:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 194 states have (on average 1.5) internal successors, (291), 204 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 08:01:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 317 transitions. [2023-11-19 08:01:47,594 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 317 transitions. Word has length 10 [2023-11-19 08:01:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:47,594 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 317 transitions. [2023-11-19 08:01:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 317 transitions. [2023-11-19 08:01:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 08:01:47,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:47,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:47,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:47,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 545589277, now seen corresponding path program 1 times [2023-11-19 08:01:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888256678] [2023-11-19 08:01:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767669847] [2023-11-19 08:01:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:47,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:47,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:48,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:48,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:48,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:48,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:48,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888256678] [2023-11-19 08:01:48,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:48,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767669847] [2023-11-19 08:01:48,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767669847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:48,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:48,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106179375] [2023-11-19 08:01:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:48,175 INFO L87 Difference]: Start difference. First operand 210 states and 317 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:48,299 INFO L93 Difference]: Finished difference Result 438 states and 662 transitions. [2023-11-19 08:01:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 08:01:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:48,303 INFO L225 Difference]: With dead ends: 438 [2023-11-19 08:01:48,303 INFO L226 Difference]: Without dead ends: 231 [2023-11-19 08:01:48,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:48,306 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 9 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:48,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 577 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-19 08:01:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2023-11-19 08:01:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 214 states have (on average 1.4532710280373833) internal successors, (311), 224 states have internal predecessors, (311), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 08:01:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 337 transitions. [2023-11-19 08:01:48,331 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 337 transitions. Word has length 85 [2023-11-19 08:01:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:48,332 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 337 transitions. [2023-11-19 08:01:48,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 337 transitions. [2023-11-19 08:01:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 08:01:48,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:48,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:48,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:48,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:48,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:48,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1038215451, now seen corresponding path program 1 times [2023-11-19 08:01:48,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16757271] [2023-11-19 08:01:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:48,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:48,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839609872] [2023-11-19 08:01:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:48,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:48,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:48,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:01:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:48,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:48,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:49,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:49,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16757271] [2023-11-19 08:01:49,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839609872] [2023-11-19 08:01:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839609872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875550890] [2023-11-19 08:01:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:49,018 INFO L87 Difference]: Start difference. First operand 230 states and 337 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:49,110 INFO L93 Difference]: Finished difference Result 444 states and 658 transitions. [2023-11-19 08:01:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 08:01:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:49,117 INFO L225 Difference]: With dead ends: 444 [2023-11-19 08:01:49,117 INFO L226 Difference]: Without dead ends: 217 [2023-11-19 08:01:49,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:49,120 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 165 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:49,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 713 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-19 08:01:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2023-11-19 08:01:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 200 states have (on average 1.45) internal successors, (290), 210 states have internal predecessors, (290), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 08:01:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 316 transitions. [2023-11-19 08:01:49,137 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 316 transitions. Word has length 85 [2023-11-19 08:01:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:49,137 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 316 transitions. [2023-11-19 08:01:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 316 transitions. [2023-11-19 08:01:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 08:01:49,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:49,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:49,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 08:01:49,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:49,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:49,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 376537641, now seen corresponding path program 1 times [2023-11-19 08:01:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373954694] [2023-11-19 08:01:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:49,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776244426] [2023-11-19 08:01:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:49,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:49,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:49,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:49,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373954694] [2023-11-19 08:01:49,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:49,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776244426] [2023-11-19 08:01:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776244426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:49,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:49,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 08:01:49,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557080454] [2023-11-19 08:01:49,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:49,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:49,981 INFO L87 Difference]: Start difference. First operand 216 states and 316 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:50,114 INFO L93 Difference]: Finished difference Result 781 states and 1143 transitions. [2023-11-19 08:01:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:50,115 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-19 08:01:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:50,125 INFO L225 Difference]: With dead ends: 781 [2023-11-19 08:01:50,125 INFO L226 Difference]: Without dead ends: 750 [2023-11-19 08:01:50,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:50,130 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 964 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:50,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1291 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-19 08:01:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2023-11-19 08:01:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 725 states have (on average 1.4427586206896552) internal successors, (1046), 735 states have internal predecessors, (1046), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 08:01:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1090 transitions. [2023-11-19 08:01:50,188 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1090 transitions. Word has length 85 [2023-11-19 08:01:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:50,189 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1090 transitions. [2023-11-19 08:01:50,190 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1090 transitions. [2023-11-19 08:01:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-19 08:01:50,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:50,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:50,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:50,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:50,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:50,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1997604350, now seen corresponding path program 2 times [2023-11-19 08:01:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103624567] [2023-11-19 08:01:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:50,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:50,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189795292] [2023-11-19 08:01:50,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:50,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:50,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:50,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:01:50,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:50,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:01:50,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-19 08:01:52,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103624567] [2023-11-19 08:01:52,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:52,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189795292] [2023-11-19 08:01:52,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189795292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:52,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714460162] [2023-11-19 08:01:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:52,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:52,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:52,240 INFO L87 Difference]: Start difference. First operand 750 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:52,511 INFO L93 Difference]: Finished difference Result 1369 states and 1987 transitions. [2023-11-19 08:01:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2023-11-19 08:01:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:52,518 INFO L225 Difference]: With dead ends: 1369 [2023-11-19 08:01:52,518 INFO L226 Difference]: Without dead ends: 748 [2023-11-19 08:01:52,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:52,521 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 123 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:52,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 874 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-11-19 08:01:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2023-11-19 08:01:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 723 states have (on average 1.4426002766251729) internal successors, (1043), 733 states have internal predecessors, (1043), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 08:01:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1087 transitions. [2023-11-19 08:01:52,557 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1087 transitions. Word has length 310 [2023-11-19 08:01:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:52,557 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1087 transitions. [2023-11-19 08:01:52,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1087 transitions. [2023-11-19 08:01:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-11-19 08:01:52,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:52,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:52,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:52,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:52,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1159946007, now seen corresponding path program 1 times [2023-11-19 08:01:52,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:52,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939443172] [2023-11-19 08:01:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:52,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:52,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639130078] [2023-11-19 08:01:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:52,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:52,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:53,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:53,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:01:54,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:01:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939443172] [2023-11-19 08:01:54,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:54,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639130078] [2023-11-19 08:01:54,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639130078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:54,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 08:01:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649101374] [2023-11-19 08:01:54,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:01:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:01:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:01:54,771 INFO L87 Difference]: Start difference. First operand 748 states and 1087 transitions. Second operand has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 08:01:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:55,074 INFO L93 Difference]: Finished difference Result 1847 states and 2691 transitions. [2023-11-19 08:01:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:01:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 325 [2023-11-19 08:01:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:55,088 INFO L225 Difference]: With dead ends: 1847 [2023-11-19 08:01:55,089 INFO L226 Difference]: Without dead ends: 1816 [2023-11-19 08:01:55,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:01:55,091 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 3189 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3215 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:55,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3215 Valid, 2877 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-19 08:01:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1816. [2023-11-19 08:01:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1773 states have (on average 1.4410603496897914) internal successors, (2555), 1783 states have internal predecessors, (2555), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 08:01:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2635 transitions. [2023-11-19 08:01:55,156 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2635 transitions. Word has length 325 [2023-11-19 08:01:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:55,158 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 2635 transitions. [2023-11-19 08:01:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 08:01:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2635 transitions. [2023-11-19 08:01:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-19 08:01:55,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:55,186 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:55,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:55,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:01:55,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:55,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 735373321, now seen corresponding path program 2 times [2023-11-19 08:01:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:55,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440387328] [2023-11-19 08:01:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:55,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070087937] [2023-11-19 08:01:55,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:55,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:55,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:55,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:02,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:02,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:03,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 08:02:03,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:03,084 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 [2023-11-19 08:02:03,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:02:03,571 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 [2023-11-19 08:02:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3082 trivial. 0 not checked. [2023-11-19 08:02:03,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:03,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440387328] [2023-11-19 08:02:03,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070087937] [2023-11-19 08:02:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070087937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:03,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:03,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 08:02:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434707448] [2023-11-19 08:02:03,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:03,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:02:03,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:02:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:02:03,910 INFO L87 Difference]: Start difference. First operand 1816 states and 2635 transitions. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:06,862 INFO L93 Difference]: Finished difference Result 3592 states and 5203 transitions. [2023-11-19 08:02:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:02:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-19 08:02:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:06,886 INFO L225 Difference]: With dead ends: 3592 [2023-11-19 08:02:06,887 INFO L226 Difference]: Without dead ends: 1857 [2023-11-19 08:02:06,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 765 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:02:06,891 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 499 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:06,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2160 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 08:02:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2023-11-19 08:02:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1848. [2023-11-19 08:02:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1805 states have (on average 1.43601108033241) internal successors, (2592), 1815 states have internal predecessors, (2592), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 08:02:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2672 transitions. [2023-11-19 08:02:06,957 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2672 transitions. Word has length 775 [2023-11-19 08:02:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:06,957 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 2672 transitions. [2023-11-19 08:02:06,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2672 transitions. [2023-11-19 08:02:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-19 08:02:06,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:06,987 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 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] [2023-11-19 08:02:07,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:07,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:02:07,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:07,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1313766261, now seen corresponding path program 1 times [2023-11-19 08:02:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988034332] [2023-11-19 08:02:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:07,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:07,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170651081] [2023-11-19 08:02:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:07,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:07,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:07,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:02:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:09,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:02:09,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 3145 trivial. 0 not checked. [2023-11-19 08:02:09,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:09,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:09,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988034332] [2023-11-19 08:02:09,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:09,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170651081] [2023-11-19 08:02:09,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170651081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:09,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:09,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016570301] [2023-11-19 08:02:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:09,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:09,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:09,338 INFO L87 Difference]: Start difference. First operand 1848 states and 2672 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:09,538 INFO L93 Difference]: Finished difference Result 4663 states and 6858 transitions. [2023-11-19 08:02:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:02:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-19 08:02:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:09,557 INFO L225 Difference]: With dead ends: 4663 [2023-11-19 08:02:09,558 INFO L226 Difference]: Without dead ends: 2916 [2023-11-19 08:02:09,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:09,563 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 142 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:09,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1143 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:02:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2023-11-19 08:02:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2055. [2023-11-19 08:02:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2012 states have (on average 1.3986083499005963) internal successors, (2814), 2022 states have internal predecessors, (2814), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 08:02:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2894 transitions. [2023-11-19 08:02:09,664 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2894 transitions. Word has length 775 [2023-11-19 08:02:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:09,665 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2894 transitions. [2023-11-19 08:02:09,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:02:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2894 transitions. [2023-11-19 08:02:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-11-19 08:02:09,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:09,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:09,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:09,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:09,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:09,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1292134931, now seen corresponding path program 1 times [2023-11-19 08:02:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065926001] [2023-11-19 08:02:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:10,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286813770] [2023-11-19 08:02:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:10,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:10,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d6f68a-38aa-4cba-9aaa-5fccf4611578/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:02:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:29,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 08:02:29,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:29,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 08:02:30,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:02:30,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-19 08:02:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2023-11-19 08:02:30,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:31,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:02:31,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-19 08:02:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065926001] [2023-11-19 08:02:32,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:32,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286813770] [2023-11-19 08:02:32,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286813770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:32,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:32,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-19 08:02:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417126614] [2023-11-19 08:02:32,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:32,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:02:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:02:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:02:32,779 INFO L87 Difference]: Start difference. First operand 2055 states and 2894 transitions. Second operand has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)