./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme --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 938d0421a545f95d5fd4476ad4101c37e59d7c0d9287a6793e2d4f45bec79d41 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:38,042 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:38,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:50:38,138 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:38,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:38,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:38,165 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:38,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:38,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:38,168 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:38,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:38,169 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:38,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:38,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:38,171 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:38,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:38,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:50:38,173 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:38,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:38,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:38,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:38,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:50:38,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:38,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:50:38,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:38,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:50:38,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:38,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:38,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:38,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:38,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:38,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:38,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:38,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:38,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:50:38,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:38,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:38,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:38,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:38,186 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:50:38,186 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:38,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:38,187 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_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 938d0421a545f95d5fd4476ad4101c37e59d7c0d9287a6793e2d4f45bec79d41 [2023-11-26 11:50:38,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:38,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:38,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:38,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:38,515 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:38,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i [2023-11-26 11:50:41,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:41,893 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:41,894 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i [2023-11-26 11:50:41,910 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/data/b71421791/0f3ad92d19674e15972607e9e1439dd0/FLAG5fdb1e746 [2023-11-26 11:50:41,924 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/data/b71421791/0f3ad92d19674e15972607e9e1439dd0 [2023-11-26 11:50:41,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:41,929 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:41,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:41,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:41,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:41,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:41" (1/1) ... [2023-11-26 11:50:41,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cc92c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:41, skipping insertion in model container [2023-11-26 11:50:41,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:41" (1/1) ... [2023-11-26 11:50:42,017 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:42,161 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_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i[916,929] [2023-11-26 11:50:42,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:42,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:42,412 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_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-11.i[916,929] [2023-11-26 11:50:42,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:42,544 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:42,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42 WrapperNode [2023-11-26 11:50:42,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:42,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:42,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:42,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:42,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,673 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 424 [2023-11-26 11:50:42,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:42,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:42,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:42,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:42,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,739 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:50:42,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:42,797 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:42,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:42,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:42,799 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (1/1) ... [2023-11-26 11:50:42,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:42,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:50:42,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:50:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:42,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:43,030 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:43,033 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:43,885 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:43,968 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:43,968 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:50:43,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:43 BoogieIcfgContainer [2023-11-26 11:50:43,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:43,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:43,973 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:43,976 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:43,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:41" (1/3) ... [2023-11-26 11:50:43,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f1365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:43, skipping insertion in model container [2023-11-26 11:50:43,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:42" (2/3) ... [2023-11-26 11:50:43,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f1365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:43, skipping insertion in model container [2023-11-26 11:50:43,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:43" (3/3) ... [2023-11-26 11:50:43,979 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-11.i [2023-11-26 11:50:43,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:43,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:50:44,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:44,048 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;@31beb888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:44,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:50:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 114 states have internal predecessors, (174), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-26 11:50:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 11:50:44,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:44,098 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:44,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:44,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash -755834609, now seen corresponding path program 1 times [2023-11-26 11:50:44,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:44,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481849606] [2023-11-26 11:50:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481849606] [2023-11-26 11:50:44,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:50:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504993694] [2023-11-26 11:50:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:44,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:44,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:50:44,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-26 11:50:44,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504993694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:44,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:44,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670815285] [2023-11-26 11:50:44,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:44,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:50:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:50:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:45,019 INFO L87 Difference]: Start difference. First operand has 161 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 114 states have internal predecessors, (174), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-26 11:50:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:45,080 INFO L93 Difference]: Finished difference Result 319 states and 571 transitions. [2023-11-26 11:50:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:50:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 309 [2023-11-26 11:50:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:45,093 INFO L225 Difference]: With dead ends: 319 [2023-11-26 11:50:45,094 INFO L226 Difference]: Without dead ends: 159 [2023-11-26 11:50:45,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:45,102 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:45,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-26 11:50:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-26 11:50:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-26 11:50:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 255 transitions. [2023-11-26 11:50:45,167 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 255 transitions. Word has length 309 [2023-11-26 11:50:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:45,168 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 255 transitions. [2023-11-26 11:50:45,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-26 11:50:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 255 transitions. [2023-11-26 11:50:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 11:50:45,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:45,177 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:45,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:50:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:50:45,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:45,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2019433711, now seen corresponding path program 1 times [2023-11-26 11:50:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:45,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47529789] [2023-11-26 11:50:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:45,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193079551] [2023-11-26 11:50:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:45,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:45,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:45,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:45,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:45,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:45,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:50:46,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:46,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:46,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47529789] [2023-11-26 11:50:46,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:46,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193079551] [2023-11-26 11:50:46,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193079551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:46,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:46,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:46,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929459933] [2023-11-26 11:50:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:46,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:46,403 INFO L87 Difference]: Start difference. First operand 159 states and 255 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:46,704 INFO L93 Difference]: Finished difference Result 476 states and 764 transitions. [2023-11-26 11:50:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-26 11:50:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:46,711 INFO L225 Difference]: With dead ends: 476 [2023-11-26 11:50:46,712 INFO L226 Difference]: Without dead ends: 318 [2023-11-26 11:50:46,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:46,716 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 193 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:46,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 748 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-26 11:50:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2023-11-26 11:50:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 218 states have (on average 1.4724770642201834) internal successors, (321), 218 states have internal predecessors, (321), 90 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-26 11:50:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 501 transitions. [2023-11-26 11:50:46,782 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 501 transitions. Word has length 309 [2023-11-26 11:50:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:46,784 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 501 transitions. [2023-11-26 11:50:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 501 transitions. [2023-11-26 11:50:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 11:50:46,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:46,792 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:46,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:46,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:46,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:47,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1575533037, now seen corresponding path program 1 times [2023-11-26 11:50:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:47,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901756622] [2023-11-26 11:50:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:47,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:47,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728973755] [2023-11-26 11:50:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:47,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:47,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:47,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:47,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:50:48,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901756622] [2023-11-26 11:50:48,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728973755] [2023-11-26 11:50:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728973755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:48,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:48,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:48,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041566849] [2023-11-26 11:50:48,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:48,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:48,099 INFO L87 Difference]: Start difference. First operand 311 states and 501 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:48,545 INFO L93 Difference]: Finished difference Result 884 states and 1425 transitions. [2023-11-26 11:50:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-26 11:50:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:48,553 INFO L225 Difference]: With dead ends: 884 [2023-11-26 11:50:48,553 INFO L226 Difference]: Without dead ends: 708 [2023-11-26 11:50:48,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:48,555 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 385 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:48,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 576 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-26 11:50:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 503. [2023-11-26 11:50:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 364 states have (on average 1.4862637362637363) internal successors, (541), 364 states have internal predecessors, (541), 135 states have call successors, (135), 3 states have call predecessors, (135), 3 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-26 11:50:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 811 transitions. [2023-11-26 11:50:48,624 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 811 transitions. Word has length 309 [2023-11-26 11:50:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:48,626 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 811 transitions. [2023-11-26 11:50:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 811 transitions. [2023-11-26 11:50:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-26 11:50:48,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:48,632 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:48,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:48,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:48,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:48,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 333867525, now seen corresponding path program 1 times [2023-11-26 11:50:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353752210] [2023-11-26 11:50:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:48,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486072871] [2023-11-26 11:50:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:48,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:48,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:49,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:49,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:50:49,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:49,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:49,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353752210] [2023-11-26 11:50:49,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:49,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486072871] [2023-11-26 11:50:49,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486072871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:49,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723594909] [2023-11-26 11:50:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:49,288 INFO L87 Difference]: Start difference. First operand 503 states and 811 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:49,437 INFO L93 Difference]: Finished difference Result 1109 states and 1788 transitions. [2023-11-26 11:50:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 309 [2023-11-26 11:50:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:49,443 INFO L225 Difference]: With dead ends: 1109 [2023-11-26 11:50:49,444 INFO L226 Difference]: Without dead ends: 715 [2023-11-26 11:50:49,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:49,446 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 212 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:49,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 607 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-26 11:50:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 572. [2023-11-26 11:50:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 433 states have (on average 1.4711316397228638) internal successors, (637), 433 states have internal predecessors, (637), 135 states have call successors, (135), 3 states have call predecessors, (135), 3 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-26 11:50:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 907 transitions. [2023-11-26 11:50:49,507 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 907 transitions. Word has length 309 [2023-11-26 11:50:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:49,508 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 907 transitions. [2023-11-26 11:50:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:50:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 907 transitions. [2023-11-26 11:50:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-26 11:50:49,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:49,515 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:49,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:49,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -972891466, now seen corresponding path program 1 times [2023-11-26 11:50:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:49,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281961723] [2023-11-26 11:50:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:49,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:49,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708790892] [2023-11-26 11:50:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:49,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:49,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:49,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:49,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:50,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:50:50,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 384 proven. 126 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-26 11:50:50,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-26 11:50:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281961723] [2023-11-26 11:50:50,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:50,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708790892] [2023-11-26 11:50:50,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708790892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:50,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:50:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376875424] [2023-11-26 11:50:50,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:50,787 INFO L87 Difference]: Start difference. First operand 572 states and 907 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-26 11:50:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:51,182 INFO L93 Difference]: Finished difference Result 1054 states and 1654 transitions. [2023-11-26 11:50:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:50:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 310 [2023-11-26 11:50:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:51,189 INFO L225 Difference]: With dead ends: 1054 [2023-11-26 11:50:51,189 INFO L226 Difference]: Without dead ends: 596 [2023-11-26 11:50:51,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:51,191 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 231 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:51,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 487 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-26 11:50:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 584. [2023-11-26 11:50:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 442 states have (on average 1.4389140271493213) internal successors, (636), 442 states have internal predecessors, (636), 135 states have call successors, (135), 6 states have call predecessors, (135), 6 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-26 11:50:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 906 transitions. [2023-11-26 11:50:51,261 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 906 transitions. Word has length 310 [2023-11-26 11:50:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:51,262 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 906 transitions. [2023-11-26 11:50:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-26 11:50:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 906 transitions. [2023-11-26 11:50:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-26 11:50:51,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:51,269 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:51,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:51,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:51,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1667536862, now seen corresponding path program 1 times [2023-11-26 11:50:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:51,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271004893] [2023-11-26 11:50:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:51,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:51,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478799611] [2023-11-26 11:50:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:51,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:51,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:51,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:51,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:50:51,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1154 proven. 21 refuted. 0 times theorem prover too weak. 2785 trivial. 0 not checked. [2023-11-26 11:50:52,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 111 proven. 21 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-26 11:50:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271004893] [2023-11-26 11:50:52,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478799611] [2023-11-26 11:50:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478799611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:52,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 11:50:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350923910] [2023-11-26 11:50:52,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:52,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:52,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:52,233 INFO L87 Difference]: Start difference. First operand 584 states and 906 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-11-26 11:50:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:53,404 INFO L93 Difference]: Finished difference Result 1218 states and 1871 transitions. [2023-11-26 11:50:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:50:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 312 [2023-11-26 11:50:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:53,416 INFO L225 Difference]: With dead ends: 1218 [2023-11-26 11:50:53,416 INFO L226 Difference]: Without dead ends: 732 [2023-11-26 11:50:53,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:50:53,421 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 568 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:53,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1098 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:50:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-11-26 11:50:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 576. [2023-11-26 11:50:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 431 states have (on average 1.3897911832946637) internal successors, (599), 431 states have internal predecessors, (599), 135 states have call successors, (135), 9 states have call predecessors, (135), 9 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-26 11:50:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 869 transitions. [2023-11-26 11:50:53,543 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 869 transitions. Word has length 312 [2023-11-26 11:50:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:53,543 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 869 transitions. [2023-11-26 11:50:53,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-11-26 11:50:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 869 transitions. [2023-11-26 11:50:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-26 11:50:53,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:53,549 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:53,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:53,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:53,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:53,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:53,757 INFO L85 PathProgramCache]: Analyzing trace with hash -364507655, now seen corresponding path program 1 times [2023-11-26 11:50:53,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768824457] [2023-11-26 11:50:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:53,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:53,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:53,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233198637] [2023-11-26 11:50:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:53,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:53,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:54,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 11:50:54,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2088 proven. 231 refuted. 0 times theorem prover too weak. 1641 trivial. 0 not checked. [2023-11-26 11:50:56,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 78 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-26 11:50:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768824457] [2023-11-26 11:50:57,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:57,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233198637] [2023-11-26 11:50:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233198637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:57,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2023-11-26 11:50:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116071405] [2023-11-26 11:50:57,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:50:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:50:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:50:57,325 INFO L87 Difference]: Start difference. First operand 576 states and 869 transitions. Second operand has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-26 11:51:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:05,928 INFO L93 Difference]: Finished difference Result 3373 states and 4959 transitions. [2023-11-26 11:51:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-26 11:51:05,930 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 313 [2023-11-26 11:51:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:05,956 INFO L225 Difference]: With dead ends: 3373 [2023-11-26 11:51:05,956 INFO L226 Difference]: Without dead ends: 2992 [2023-11-26 11:51:05,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1632, Invalid=5850, Unknown=0, NotChecked=0, Total=7482 [2023-11-26 11:51:05,965 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 4021 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 4787 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 4787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:05,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4027 Valid, 4717 Invalid, 5793 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1006 Valid, 4787 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-26 11:51:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2023-11-26 11:51:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1777. [2023-11-26 11:51:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1395 states have (on average 1.3813620071684587) internal successors, (1927), 1407 states have internal predecessors, (1927), 337 states have call successors, (337), 44 states have call predecessors, (337), 44 states have return successors, (337), 325 states have call predecessors, (337), 337 states have call successors, (337) [2023-11-26 11:51:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2601 transitions. [2023-11-26 11:51:06,230 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2601 transitions. Word has length 313 [2023-11-26 11:51:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:06,231 INFO L495 AbstractCegarLoop]: Abstraction has 1777 states and 2601 transitions. [2023-11-26 11:51:06,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 25 states have internal predecessors, (189), 6 states have call successors, (90), 5 states have call predecessors, (90), 8 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-26 11:51:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2601 transitions. [2023-11-26 11:51:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-26 11:51:06,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:06,236 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:06,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:06,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash 152764021, now seen corresponding path program 1 times [2023-11-26 11:51:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980606927] [2023-11-26 11:51:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:06,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485804573] [2023-11-26 11:51:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:06,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:06,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:06,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:51:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:06,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:06,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:51:06,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:06,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980606927] [2023-11-26 11:51:06,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485804573] [2023-11-26 11:51:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485804573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:06,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:06,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541278668] [2023-11-26 11:51:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:06,877 INFO L87 Difference]: Start difference. First operand 1777 states and 2601 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:07,084 INFO L93 Difference]: Finished difference Result 2745 states and 4021 transitions. [2023-11-26 11:51:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-26 11:51:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:07,099 INFO L225 Difference]: With dead ends: 2745 [2023-11-26 11:51:07,099 INFO L226 Difference]: Without dead ends: 1494 [2023-11-26 11:51:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:07,104 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:07,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-26 11:51:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-26 11:51:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.382747068676717) internal successors, (1651), 1202 states have internal predecessors, (1651), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-26 11:51:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2181 transitions. [2023-11-26 11:51:07,341 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2181 transitions. Word has length 313 [2023-11-26 11:51:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:07,342 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2181 transitions. [2023-11-26 11:51:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2181 transitions. [2023-11-26 11:51:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-26 11:51:07,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:07,346 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:07,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:07,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash 451767178, now seen corresponding path program 1 times [2023-11-26 11:51:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:07,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655694915] [2023-11-26 11:51:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:07,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018266764] [2023-11-26 11:51:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:07,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:07,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:51:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:07,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:07,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:51:07,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655694915] [2023-11-26 11:51:07,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018266764] [2023-11-26 11:51:07,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018266764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:07,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:07,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:07,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680283037] [2023-11-26 11:51:07,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:07,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:07,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:07,993 INFO L87 Difference]: Start difference. First operand 1494 states and 2181 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:08,243 INFO L93 Difference]: Finished difference Result 2579 states and 3759 transitions. [2023-11-26 11:51:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 314 [2023-11-26 11:51:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:08,255 INFO L225 Difference]: With dead ends: 2579 [2023-11-26 11:51:08,255 INFO L226 Difference]: Without dead ends: 1494 [2023-11-26 11:51:08,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:08,259 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 2 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:08,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 443 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:51:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-26 11:51:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-26 11:51:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.3726968174204355) internal successors, (1639), 1202 states have internal predecessors, (1639), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-26 11:51:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2169 transitions. [2023-11-26 11:51:08,471 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2169 transitions. Word has length 314 [2023-11-26 11:51:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2169 transitions. [2023-11-26 11:51:08,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2169 transitions. [2023-11-26 11:51:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-26 11:51:08,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:08,476 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:08,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:08,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:08,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:08,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash 709932616, now seen corresponding path program 1 times [2023-11-26 11:51:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:08,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484378484] [2023-11-26 11:51:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:08,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:08,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:08,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960394295] [2023-11-26 11:51:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:08,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:08,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:51:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:09,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:51:09,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 150 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2023-11-26 11:51:09,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-26 11:51:10,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484378484] [2023-11-26 11:51:10,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960394295] [2023-11-26 11:51:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960394295] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:10,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:51:10,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-26 11:51:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914770016] [2023-11-26 11:51:10,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:51:10,196 INFO L87 Difference]: Start difference. First operand 1494 states and 2169 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:10,695 INFO L93 Difference]: Finished difference Result 2816 states and 4086 transitions. [2023-11-26 11:51:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:10,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 314 [2023-11-26 11:51:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:10,706 INFO L225 Difference]: With dead ends: 2816 [2023-11-26 11:51:10,706 INFO L226 Difference]: Without dead ends: 1494 [2023-11-26 11:51:10,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:51:10,710 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 307 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:10,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 662 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:51:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-26 11:51:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2023-11-26 11:51:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1194 states have (on average 1.3601340033500837) internal successors, (1624), 1202 states have internal predecessors, (1624), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2023-11-26 11:51:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2154 transitions. [2023-11-26 11:51:10,890 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2154 transitions. Word has length 314 [2023-11-26 11:51:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:10,890 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 2154 transitions. [2023-11-26 11:51:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-26 11:51:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2154 transitions. [2023-11-26 11:51:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-26 11:51:10,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:10,894 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:10,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:11,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:11,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -183553722, now seen corresponding path program 1 times [2023-11-26 11:51:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539375498] [2023-11-26 11:51:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:11,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985037608] [2023-11-26 11:51:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:11,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:11,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:11,152 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:11,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4028b14-22e1-443e-ab4c-5a0ec4a0eff6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:51:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:11,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:51:11,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2057 proven. 162 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2023-11-26 11:51:12,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 54 proven. 78 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-26 11:51:13,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:13,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539375498] [2023-11-26 11:51:13,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:13,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985037608] [2023-11-26 11:51:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985037608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:13,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:13,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-26 11:51:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411355142] [2023-11-26 11:51:13,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:13,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:51:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:51:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:51:13,531 INFO L87 Difference]: Start difference. First operand 1494 states and 2154 transitions. Second operand has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 4 states have call successors, (74), 3 states have call predecessors, (74), 6 states have return successors, (75), 4 states have call predecessors, (75), 4 states have call successors, (75)