./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5161832faa85efa7698287d22f9a23de4fa8b958c1b2d2c225d3d8c999a24ce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:37:57,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:37:57,563 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:37:57,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:37:57,570 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:37:57,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:37:57,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:37:57,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:37:57,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:37:57,603 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:37:57,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:37:57,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:37:57,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:37:57,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:37:57,607 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:37:57,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:37:57,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:37:57,609 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:37:57,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:37:57,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:37:57,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:37:57,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:37:57,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:37:57,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:37:57,614 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:37:57,615 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:37:57,615 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:37:57,616 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:37:57,616 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:37:57,617 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:37:57,617 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:37:57,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:57,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:37:57,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:37:57,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:37:57,620 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:37:57,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:37:57,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:37:57,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:37:57,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:37:57,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:37:57,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:37:57,623 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_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5161832faa85efa7698287d22f9a23de4fa8b958c1b2d2c225d3d8c999a24ce [2023-11-23 21:37:57,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:37:58,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:37:58,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:37:58,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:37:58,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:37:58,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c [2023-11-23 21:38:01,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:38:01,554 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:38:01,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c [2023-11-23 21:38:01,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/data/47d6affb4/9d3551fb508740c28107e6e8aa2e550f/FLAG3a05f4b1e [2023-11-23 21:38:01,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/data/47d6affb4/9d3551fb508740c28107e6e8aa2e550f [2023-11-23 21:38:01,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:38:01,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:38:01,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:38:01,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:38:01,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:38:01,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a71a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01, skipping insertion in model container [2023-11-23 21:38:01,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,645 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:38:01,831 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_e4186832-4ede-4337-aea0-c76eec0a2031/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2023-11-23 21:38:01,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:38:01,863 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:38:01,876 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_e4186832-4ede-4337-aea0-c76eec0a2031/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2023-11-23 21:38:01,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:38:01,901 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:38:01,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01 WrapperNode [2023-11-23 21:38:01,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:38:01,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:38:01,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:38:01,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:38:01,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,938 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-23 21:38:01,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:38:01,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:38:01,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:38:01,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:38:01,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,954 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,964 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:38:01,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,973 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,976 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:38:01,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:38:01,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:38:01,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:38:01,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (1/1) ... [2023-11-23 21:38:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:38:02,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:02,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:38:02,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:38:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:38:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:38:02,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:38:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:38:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:38:02,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:38:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:38:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:38:02,130 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:38:02,133 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:38:02,336 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:38:02,370 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:38:02,370 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:38:02,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:38:02 BoogieIcfgContainer [2023-11-23 21:38:02,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:38:02,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:38:02,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:38:02,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:38:02,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:38:01" (1/3) ... [2023-11-23 21:38:02,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b89742e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:38:02, skipping insertion in model container [2023-11-23 21:38:02,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:38:01" (2/3) ... [2023-11-23 21:38:02,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b89742e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:38:02, skipping insertion in model container [2023-11-23 21:38:02,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:38:02" (3/3) ... [2023-11-23 21:38:02,382 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2023-11-23 21:38:02,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:38:02,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:38:02,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:38:02,462 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;@3e385d75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:38:02,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:38:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:38:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:38:02,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:02,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:02,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:02,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2138951705, now seen corresponding path program 1 times [2023-11-23 21:38:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711503542] [2023-11-23 21:38:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 21:38:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 21:38:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:38:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711503542] [2023-11-23 21:38:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711503542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:02,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:38:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512137752] [2023-11-23 21:38:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:02,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:38:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:38:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:38:02,800 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:38:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:02,854 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2023-11-23 21:38:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:38:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-23 21:38:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:02,866 INFO L225 Difference]: With dead ends: 52 [2023-11-23 21:38:02,866 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:38:02,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:38:02,876 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:02,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:38:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 21:38:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 21:38:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-11-23 21:38:02,936 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 17 [2023-11-23 21:38:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:02,937 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-23 21:38:02,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:38:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-11-23 21:38:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:38:02,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:02,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:38:02,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:02,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -443127421, now seen corresponding path program 1 times [2023-11-23 21:38:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203205774] [2023-11-23 21:38:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 21:38:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 21:38:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:38:03,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:03,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203205774] [2023-11-23 21:38:03,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203205774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:03,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:03,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:38:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027856686] [2023-11-23 21:38:03,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:03,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:38:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:38:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:03,210 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-23 21:38:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:03,239 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2023-11-23 21:38:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:38:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 18 [2023-11-23 21:38:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:03,241 INFO L225 Difference]: With dead ends: 37 [2023-11-23 21:38:03,241 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:38:03,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:38:03,244 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:03,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:38:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:38:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 21:38:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-23 21:38:03,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 18 [2023-11-23 21:38:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:03,257 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-23 21:38:03,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-23 21:38:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-23 21:38:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:38:03,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:03,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:03,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:38:03,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:03,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash -441459125, now seen corresponding path program 1 times [2023-11-23 21:38:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332428776] [2023-11-23 21:38:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:03,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805297711] [2023-11-23 21:38:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:03,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:03,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:38:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:03,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:38:03,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:38:03,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:03,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:03,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332428776] [2023-11-23 21:38:03,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:03,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805297711] [2023-11-23 21:38:03,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805297711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:03,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:03,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984914610] [2023-11-23 21:38:03,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:38:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:38:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:38:03,494 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-23 21:38:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:03,559 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2023-11-23 21:38:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:38:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 18 [2023-11-23 21:38:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:03,561 INFO L225 Difference]: With dead ends: 44 [2023-11-23 21:38:03,561 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:38:03,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:03,563 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:03,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:38:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-11-23 21:38:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:38:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-11-23 21:38:03,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 18 [2023-11-23 21:38:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:03,578 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-11-23 21:38:03,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-23 21:38:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2023-11-23 21:38:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:38:03,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:03,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:03,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:38:03,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:03,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1203735897, now seen corresponding path program 1 times [2023-11-23 21:38:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252469902] [2023-11-23 21:38:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:03,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050747444] [2023-11-23 21:38:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:03,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:03,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:03,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:38:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:03,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:38:03,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:38:04,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252469902] [2023-11-23 21:38:04,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050747444] [2023-11-23 21:38:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050747444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:04,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:04,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635675809] [2023-11-23 21:38:04,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:04,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:38:04,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:38:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:38:04,085 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:38:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:04,174 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-11-23 21:38:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:38:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-23 21:38:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:04,176 INFO L225 Difference]: With dead ends: 48 [2023-11-23 21:38:04,176 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 21:38:04,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:04,178 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:04,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 21:38:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-23 21:38:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:38:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-23 21:38:04,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 23 [2023-11-23 21:38:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:04,191 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-23 21:38:04,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:38:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-23 21:38:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:38:04,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:04,193 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:04,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:04,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:04,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:04,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash 705122187, now seen corresponding path program 1 times [2023-11-23 21:38:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:04,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736010104] [2023-11-23 21:38:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:04,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:04,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502040885] [2023-11-23 21:38:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:04,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:04,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:38:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:04,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:38:04,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:38:04,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736010104] [2023-11-23 21:38:04,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502040885] [2023-11-23 21:38:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502040885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:04,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:04,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:04,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538084475] [2023-11-23 21:38:04,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:38:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:38:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:38:04,614 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2023-11-23 21:38:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:04,731 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2023-11-23 21:38:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:38:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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 28 [2023-11-23 21:38:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:04,739 INFO L225 Difference]: With dead ends: 70 [2023-11-23 21:38:04,740 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:38:04,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:04,743 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:04,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:38:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:38:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 21:38:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-23 21:38:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2023-11-23 21:38:04,783 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 28 [2023-11-23 21:38:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:04,784 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2023-11-23 21:38:04,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2023-11-23 21:38:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2023-11-23 21:38:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:38:04,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:04,787 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:04,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:04,998 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:04,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1795283768, now seen corresponding path program 1 times [2023-11-23 21:38:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275929836] [2023-11-23 21:38:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:05,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:05,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596366513] [2023-11-23 21:38:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:05,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:05,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:05,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:38:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:05,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:38:05,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:38:05,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275929836] [2023-11-23 21:38:05,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596366513] [2023-11-23 21:38:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596366513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:05,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885828108] [2023-11-23 21:38:05,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:05,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:38:05,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:38:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:38:05,099 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:38:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:05,151 INFO L93 Difference]: Finished difference Result 82 states and 118 transitions. [2023-11-23 21:38:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:38:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-11-23 21:38:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:05,154 INFO L225 Difference]: With dead ends: 82 [2023-11-23 21:38:05,154 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:38:05,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:05,155 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:05,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:38:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-11-23 21:38:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 44 states have internal predecessors, (49), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-23 21:38:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2023-11-23 21:38:05,178 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 34 [2023-11-23 21:38:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:05,178 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2023-11-23 21:38:05,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:38:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2023-11-23 21:38:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:38:05,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:05,180 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:05,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:38:05,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:05,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -427827123, now seen corresponding path program 1 times [2023-11-23 21:38:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308215180] [2023-11-23 21:38:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:05,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:05,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415057625] [2023-11-23 21:38:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:05,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:05,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:38:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:05,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:38:05,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:38:05,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:38:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308215180] [2023-11-23 21:38:05,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415057625] [2023-11-23 21:38:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415057625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:05,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:05,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-23 21:38:05,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936417720] [2023-11-23 21:38:05,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:38:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:38:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:38:05,631 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:38:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:05,766 INFO L93 Difference]: Finished difference Result 217 states and 285 transitions. [2023-11-23 21:38:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:38:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2023-11-23 21:38:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:05,770 INFO L225 Difference]: With dead ends: 217 [2023-11-23 21:38:05,770 INFO L226 Difference]: Without dead ends: 195 [2023-11-23 21:38:05,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:38:05,772 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:05,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 116 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:38:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-23 21:38:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2023-11-23 21:38:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 118 states have internal predecessors, (131), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-23 21:38:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 246 transitions. [2023-11-23 21:38:05,814 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 246 transitions. Word has length 37 [2023-11-23 21:38:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:05,815 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 246 transitions. [2023-11-23 21:38:05,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:38:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 246 transitions. [2023-11-23 21:38:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:38:05,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:05,817 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:05,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:06,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:06,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:06,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash -426158827, now seen corresponding path program 1 times [2023-11-23 21:38:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:06,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846207590] [2023-11-23 21:38:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:06,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:06,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073779191] [2023-11-23 21:38:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:06,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:06,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:38:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:06,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:38:06,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:38:06,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846207590] [2023-11-23 21:38:06,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073779191] [2023-11-23 21:38:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073779191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:06,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221190190] [2023-11-23 21:38:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:38:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:38:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:38:06,214 INFO L87 Difference]: Start difference. First operand 189 states and 246 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:38:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:06,295 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2023-11-23 21:38:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:38:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-23 21:38:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:06,303 INFO L225 Difference]: With dead ends: 203 [2023-11-23 21:38:06,303 INFO L226 Difference]: Without dead ends: 198 [2023-11-23 21:38:06,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:06,305 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:06,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 105 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-23 21:38:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-23 21:38:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.206896551724138) internal successors, (140), 127 states have internal predecessors, (140), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:38:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 249 transitions. [2023-11-23 21:38:06,368 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 249 transitions. Word has length 37 [2023-11-23 21:38:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:06,368 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 249 transitions. [2023-11-23 21:38:06,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:38:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 249 transitions. [2023-11-23 21:38:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:38:06,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:06,372 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:06,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:06,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:06,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:06,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1298990710, now seen corresponding path program 1 times [2023-11-23 21:38:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:06,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286161425] [2023-11-23 21:38:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:06,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178150178] [2023-11-23 21:38:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:06,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:38:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:06,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:38:06,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:38:06,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:38:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286161425] [2023-11-23 21:38:06,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178150178] [2023-11-23 21:38:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178150178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:06,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:38:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400121740] [2023-11-23 21:38:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:38:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:38:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:06,796 INFO L87 Difference]: Start difference. First operand 198 states and 249 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:38:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:06,934 INFO L93 Difference]: Finished difference Result 229 states and 278 transitions. [2023-11-23 21:38:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:38:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-11-23 21:38:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:06,940 INFO L225 Difference]: With dead ends: 229 [2023-11-23 21:38:06,940 INFO L226 Difference]: Without dead ends: 219 [2023-11-23 21:38:06,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:38:06,944 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:06,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:38:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-23 21:38:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2023-11-23 21:38:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 129 states have (on average 1.178294573643411) internal successors, (152), 140 states have internal predecessors, (152), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:38:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 260 transitions. [2023-11-23 21:38:06,981 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 260 transitions. Word has length 39 [2023-11-23 21:38:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:06,981 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 260 transitions. [2023-11-23 21:38:06,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:38:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 260 transitions. [2023-11-23 21:38:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:38:06,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:06,987 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:07,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 21:38:07,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:07,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:07,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1786533347, now seen corresponding path program 2 times [2023-11-23 21:38:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:07,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798933287] [2023-11-23 21:38:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:07,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:07,223 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542038799] [2023-11-23 21:38:07,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:38:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:07,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:07,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:38:07,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:38:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:07,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 21:38:07,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:38:07,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:38:08,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:08,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798933287] [2023-11-23 21:38:08,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:08,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542038799] [2023-11-23 21:38:08,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542038799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:08,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-11-23 21:38:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849899902] [2023-11-23 21:38:08,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:38:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:38:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:38:08,165 INFO L87 Difference]: Start difference. First operand 215 states and 260 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-23 21:38:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:09,009 INFO L93 Difference]: Finished difference Result 265 states and 334 transitions. [2023-11-23 21:38:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:38:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 42 [2023-11-23 21:38:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:09,013 INFO L225 Difference]: With dead ends: 265 [2023-11-23 21:38:09,013 INFO L226 Difference]: Without dead ends: 263 [2023-11-23 21:38:09,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:38:09,015 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:09,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 219 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:38:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-23 21:38:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 227. [2023-11-23 21:38:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 149 states have internal predecessors, (161), 57 states have call successors, (57), 31 states have call predecessors, (57), 31 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:38:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2023-11-23 21:38:09,089 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 42 [2023-11-23 21:38:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:09,090 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2023-11-23 21:38:09,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-23 21:38:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2023-11-23 21:38:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:38:09,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:09,092 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:09,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:09,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:38:09,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:09,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1675496919, now seen corresponding path program 1 times [2023-11-23 21:38:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257604959] [2023-11-23 21:38:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:09,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419699765] [2023-11-23 21:38:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:09,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:09,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:09,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:38:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:09,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:38:09,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-23 21:38:09,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:38:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257604959] [2023-11-23 21:38:09,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419699765] [2023-11-23 21:38:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419699765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:09,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:09,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2023-11-23 21:38:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959607249] [2023-11-23 21:38:09,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:09,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:38:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:38:09,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:38:09,917 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 21:38:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:11,331 INFO L93 Difference]: Finished difference Result 304 states and 389 transitions. [2023-11-23 21:38:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:38:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 47 [2023-11-23 21:38:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:11,338 INFO L225 Difference]: With dead ends: 304 [2023-11-23 21:38:11,339 INFO L226 Difference]: Without dead ends: 259 [2023-11-23 21:38:11,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:38:11,340 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:11,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 261 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:38:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-23 21:38:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 229. [2023-11-23 21:38:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 144 states have (on average 1.1875) internal successors, (171), 152 states have internal predecessors, (171), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:38:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions. [2023-11-23 21:38:11,417 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 47 [2023-11-23 21:38:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:11,417 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions. [2023-11-23 21:38:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 21:38:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions. [2023-11-23 21:38:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:38:11,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:11,419 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:11,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:11,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:38:11,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:11,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash -882918259, now seen corresponding path program 1 times [2023-11-23 21:38:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:11,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551268732] [2023-11-23 21:38:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:11,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:11,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565999738] [2023-11-23 21:38:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:11,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:11,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:11,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:38:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:11,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 21:38:11,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 21:38:11,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:38:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551268732] [2023-11-23 21:38:12,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:12,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565999738] [2023-11-23 21:38:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565999738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:12,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-23 21:38:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476448205] [2023-11-23 21:38:12,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:38:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:38:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:38:12,270 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-23 21:38:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:12,788 INFO L93 Difference]: Finished difference Result 242 states and 293 transitions. [2023-11-23 21:38:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:38:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2023-11-23 21:38:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:12,791 INFO L225 Difference]: With dead ends: 242 [2023-11-23 21:38:12,792 INFO L226 Difference]: Without dead ends: 235 [2023-11-23 21:38:12,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:38:12,793 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:12,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 395 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:38:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-23 21:38:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2023-11-23 21:38:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 148 states have internal predecessors, (170), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 21:38:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 263 transitions. [2023-11-23 21:38:12,875 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 263 transitions. Word has length 56 [2023-11-23 21:38:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:12,875 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 263 transitions. [2023-11-23 21:38:12,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-23 21:38:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 263 transitions. [2023-11-23 21:38:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:38:12,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:12,877 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:12,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:13,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:38:13,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:13,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1456768256, now seen corresponding path program 1 times [2023-11-23 21:38:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:13,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483943041] [2023-11-23 21:38:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:13,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15423761] [2023-11-23 21:38:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:13,118 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:13,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:38:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:13,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:38:13,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 21:38:13,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 21:38:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483943041] [2023-11-23 21:38:13,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15423761] [2023-11-23 21:38:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15423761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:13,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-23 21:38:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914680004] [2023-11-23 21:38:13,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:38:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:38:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:38:13,388 INFO L87 Difference]: Start difference. First operand 220 states and 263 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:38:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:13,581 INFO L93 Difference]: Finished difference Result 244 states and 291 transitions. [2023-11-23 21:38:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:38:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2023-11-23 21:38:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:13,585 INFO L225 Difference]: With dead ends: 244 [2023-11-23 21:38:13,585 INFO L226 Difference]: Without dead ends: 232 [2023-11-23 21:38:13,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:38:13,586 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:13,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 144 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:38:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-23 21:38:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2023-11-23 21:38:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 156 states have internal predecessors, (170), 50 states have call successors, (50), 29 states have call predecessors, (50), 29 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:38:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2023-11-23 21:38:13,664 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 58 [2023-11-23 21:38:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:13,665 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2023-11-23 21:38:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:38:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2023-11-23 21:38:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:38:13,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:13,667 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:13,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:13,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:38:13,888 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:13,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash -244793833, now seen corresponding path program 2 times [2023-11-23 21:38:13,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:13,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868337110] [2023-11-23 21:38:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:13,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:13,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:13,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798377448] [2023-11-23 21:38:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:38:13,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:13,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:13,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:38:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:38:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:13,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 21:38:13,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-23 21:38:14,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-23 21:38:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868337110] [2023-11-23 21:38:14,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798377448] [2023-11-23 21:38:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798377448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:14,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:14,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-11-23 21:38:14,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652322609] [2023-11-23 21:38:14,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:14,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:38:14,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:38:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:38:14,670 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-11-23 21:38:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:15,614 INFO L93 Difference]: Finished difference Result 253 states and 302 transitions. [2023-11-23 21:38:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:38:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 85 [2023-11-23 21:38:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:15,617 INFO L225 Difference]: With dead ends: 253 [2023-11-23 21:38:15,617 INFO L226 Difference]: Without dead ends: 235 [2023-11-23 21:38:15,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:38:15,619 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:15,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 285 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:38:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-23 21:38:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 97. [2023-11-23 21:38:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:38:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2023-11-23 21:38:15,654 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 85 [2023-11-23 21:38:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2023-11-23 21:38:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-11-23 21:38:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2023-11-23 21:38:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 21:38:15,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:15,656 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:15,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 21:38:15,876 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:15,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash -11441917, now seen corresponding path program 2 times [2023-11-23 21:38:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:15,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056652563] [2023-11-23 21:38:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:15,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498769644] [2023-11-23 21:38:15,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:38:15,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:15,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:15,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:38:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:38:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:15,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:38:15,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 21:38:16,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-23 21:38:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056652563] [2023-11-23 21:38:16,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498769644] [2023-11-23 21:38:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498769644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:16,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:16,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-23 21:38:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651665817] [2023-11-23 21:38:16,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:38:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:38:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:38:16,252 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-11-23 21:38:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:16,568 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2023-11-23 21:38:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:38:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 94 [2023-11-23 21:38:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:16,570 INFO L225 Difference]: With dead ends: 232 [2023-11-23 21:38:16,571 INFO L226 Difference]: Without dead ends: 223 [2023-11-23 21:38:16,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:38:16,572 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 64 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:16,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 166 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:38:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-23 21:38:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 211. [2023-11-23 21:38:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 145 states have internal predecessors, (156), 35 states have call successors, (35), 32 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:38:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 224 transitions. [2023-11-23 21:38:16,644 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 224 transitions. Word has length 94 [2023-11-23 21:38:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:16,644 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 224 transitions. [2023-11-23 21:38:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-11-23 21:38:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 224 transitions. [2023-11-23 21:38:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-23 21:38:16,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:16,647 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:16,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:38:16,857 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:16,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1428770883, now seen corresponding path program 3 times [2023-11-23 21:38:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:16,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107294330] [2023-11-23 21:38:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:16,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:16,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738521419] [2023-11-23 21:38:16,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:38:16,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:16,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:16,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:38:44,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-11-23 21:38:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:44,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:38:44,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 21:38:44,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2023-11-23 21:38:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107294330] [2023-11-23 21:38:44,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738521419] [2023-11-23 21:38:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738521419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:44,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-23 21:38:44,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633903656] [2023-11-23 21:38:44,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:44,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 21:38:44,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 21:38:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:38:44,833 INFO L87 Difference]: Start difference. First operand 211 states and 224 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) [2023-11-23 21:38:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:45,666 INFO L93 Difference]: Finished difference Result 472 states and 521 transitions. [2023-11-23 21:38:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-23 21:38:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) Word has length 208 [2023-11-23 21:38:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:45,670 INFO L225 Difference]: With dead ends: 472 [2023-11-23 21:38:45,671 INFO L226 Difference]: Without dead ends: 463 [2023-11-23 21:38:45,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-11-23 21:38:45,673 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:45,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 226 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:38:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-23 21:38:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 439. [2023-11-23 21:38:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 299 states have (on average 1.0836120401337792) internal successors, (324), 301 states have internal predecessors, (324), 71 states have call successors, (71), 68 states have call predecessors, (71), 68 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-23 21:38:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 464 transitions. [2023-11-23 21:38:45,838 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 464 transitions. Word has length 208 [2023-11-23 21:38:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:45,839 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 464 transitions. [2023-11-23 21:38:45,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 23 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 22 states have call predecessors, (64), 22 states have call successors, (64) [2023-11-23 21:38:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 464 transitions. [2023-11-23 21:38:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-23 21:38:45,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:45,848 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:45,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-23 21:38:46,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:38:46,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:46,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash -534892861, now seen corresponding path program 4 times [2023-11-23 21:38:46,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:46,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664058190] [2023-11-23 21:38:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:46,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:46,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106814470] [2023-11-23 21:38:46,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:38:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:46,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:38:46,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:38:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:46,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 21:38:46,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-23 21:38:47,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2023-11-23 21:38:48,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664058190] [2023-11-23 21:38:48,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:38:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106814470] [2023-11-23 21:38:48,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106814470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:48,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:38:48,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-11-23 21:38:48,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421021725] [2023-11-23 21:38:48,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-23 21:38:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-23 21:38:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 21:38:48,591 INFO L87 Difference]: Start difference. First operand 439 states and 464 transitions. Second operand has 50 states, 50 states have (on average 5.24) internal successors, (262), 50 states have internal predecessors, (262), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) [2023-11-23 21:38:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:51,058 INFO L93 Difference]: Finished difference Result 952 states and 1049 transitions. [2023-11-23 21:38:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-23 21:38:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.24) internal successors, (262), 50 states have internal predecessors, (262), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) Word has length 436 [2023-11-23 21:38:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:51,071 INFO L225 Difference]: With dead ends: 952 [2023-11-23 21:38:51,071 INFO L226 Difference]: Without dead ends: 943 [2023-11-23 21:38:51,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2023-11-23 21:38:51,075 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 443 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:51,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 357 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:38:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-11-23 21:38:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 895. [2023-11-23 21:38:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 611 states have (on average 1.0801963993453356) internal successors, (660), 613 states have internal predecessors, (660), 143 states have call successors, (143), 140 states have call predecessors, (143), 140 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-23 21:38:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 944 transitions. [2023-11-23 21:38:51,317 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 944 transitions. Word has length 436 [2023-11-23 21:38:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 944 transitions. [2023-11-23 21:38:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.24) internal successors, (262), 50 states have internal predecessors, (262), 47 states have call successors, (137), 25 states have call predecessors, (137), 24 states have return successors, (136), 46 states have call predecessors, (136), 46 states have call successors, (136) [2023-11-23 21:38:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 944 transitions. [2023-11-23 21:38:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2023-11-23 21:38:51,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:51,355 INFO L195 NwaCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:51,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:38:51,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:51,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1540107203, now seen corresponding path program 5 times [2023-11-23 21:38:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:51,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114422796] [2023-11-23 21:38:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:51,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:38:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221080858] [2023-11-23 21:38:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:38:51,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:51,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4186832-4ede-4337-aea0-c76eec0a2031/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process