./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19040c859ca30831fc6cd7ac759a469fd491f693781bcf5be67393e1fb0ba0e1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:33:56,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:33:56,751 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:33:56,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:33:56,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:33:56,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:33:56,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:33:56,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:33:56,820 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:33:56,821 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:33:56,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:33:56,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:33:56,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:33:56,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:33:56,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:33:56,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:33:56,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:33:56,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:33:56,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:33:56,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:33:56,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:33:56,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:33:56,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:33:56,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:33:56,840 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:33:56,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:33:56,841 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:33:56,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:33:56,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:33:56,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:33:56,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:33:56,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:56,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:33:56,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:33:56,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:33:56,845 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:33:56,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:33:56,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:33:56,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:33:56,847 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:33:56,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:33:56,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:33:56,852 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_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19040c859ca30831fc6cd7ac759a469fd491f693781bcf5be67393e1fb0ba0e1 [2023-11-23 22:33:57,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:33:57,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:33:57,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:33:57,200 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:33:57,201 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:33:57,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i [2023-11-23 22:34:00,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:01,007 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:01,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i [2023-11-23 22:34:01,030 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/data/fde8a60ba/abcefb2179ab4d6d91bdfdd2fa96e5bd/FLAG5bfb84635 [2023-11-23 22:34:01,044 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/data/fde8a60ba/abcefb2179ab4d6d91bdfdd2fa96e5bd [2023-11-23 22:34:01,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:01,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:01,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:01,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:01,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:01,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e12c561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01, skipping insertion in model container [2023-11-23 22:34:01,062 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,113 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:01,287 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_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i[916,929] [2023-11-23 22:34:01,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:01,470 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:01,485 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_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-51.i[916,929] [2023-11-23 22:34:01,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:01,720 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:01,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01 WrapperNode [2023-11-23 22:34:01,720 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:01,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:01,722 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:01,722 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:01,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,821 INFO L138 Inliner]: procedures = 26, calls = 88, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 527 [2023-11-23 22:34:01,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:01,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:01,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:01,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:01,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,842 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,905 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:34:01,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,955 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:01,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:02,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:02,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:02,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:02,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (1/1) ... [2023-11-23 22:34:02,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:02,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:02,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:02,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:02,080 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:34:02,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:34:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:34:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:02,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:02,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:02,245 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:03,133 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:03,194 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:03,198 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:34:03,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:03 BoogieIcfgContainer [2023-11-23 22:34:03,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:03,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:03,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:03,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:03,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:01" (1/3) ... [2023-11-23 22:34:03,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7309e914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:03, skipping insertion in model container [2023-11-23 22:34:03,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:01" (2/3) ... [2023-11-23 22:34:03,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7309e914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:03, skipping insertion in model container [2023-11-23 22:34:03,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:03" (3/3) ... [2023-11-23 22:34:03,213 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-51.i [2023-11-23 22:34:03,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:03,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:34:03,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:03,304 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;@7f416e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:03,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:34:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 132 states have (on average 1.606060606060606) internal successors, (212), 133 states have internal predecessors, (212), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-23 22:34:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-23 22:34:03,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:03,370 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:03,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:03,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:03,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1295229926, now seen corresponding path program 1 times [2023-11-23 22:34:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716906589] [2023-11-23 22:34:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716906589] [2023-11-23 22:34:03,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:34:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416414182] [2023-11-23 22:34:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:03,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:03,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:34:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:04,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:34:04,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2023-11-23 22:34:04,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416414182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:04,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:04,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:04,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596634543] [2023-11-23 22:34:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:04,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:34:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:34:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:34:04,477 INFO L87 Difference]: Start difference. First operand has 210 states, 132 states have (on average 1.606060606060606) internal successors, (212), 133 states have internal predecessors, (212), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) [2023-11-23 22:34:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:04,584 INFO L93 Difference]: Finished difference Result 417 states and 797 transitions. [2023-11-23 22:34:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:34:04,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) Word has length 469 [2023-11-23 22:34:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:04,601 INFO L225 Difference]: With dead ends: 417 [2023-11-23 22:34:04,601 INFO L226 Difference]: Without dead ends: 208 [2023-11-23 22:34:04,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:34:04,613 INFO L413 NwaCegarLoop]: 352 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, 352 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 [2023-11-23 22:34:04,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-23 22:34:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-23 22:34:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 131 states have (on average 1.5648854961832062) internal successors, (205), 131 states have internal predecessors, (205), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-23 22:34:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 355 transitions. [2023-11-23 22:34:04,748 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 355 transitions. Word has length 469 [2023-11-23 22:34:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:04,749 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 355 transitions. [2023-11-23 22:34:04,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) [2023-11-23 22:34:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 355 transitions. [2023-11-23 22:34:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-23 22:34:04,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:04,769 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:04,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:34:04,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:34:04,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:04,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1971868140, now seen corresponding path program 1 times [2023-11-23 22:34:04,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36073276] [2023-11-23 22:34:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:05,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621253252] [2023-11-23 22:34:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:05,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:05,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:05,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:05,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:34:05,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:05,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:05,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36073276] [2023-11-23 22:34:05,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:05,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621253252] [2023-11-23 22:34:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621253252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:05,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:05,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:34:05,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390904839] [2023-11-23 22:34:05,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:05,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:34:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:34:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:05,818 INFO L87 Difference]: Start difference. First operand 208 states and 355 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:07,250 INFO L93 Difference]: Finished difference Result 1020 states and 1742 transitions. [2023-11-23 22:34:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 469 [2023-11-23 22:34:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:07,264 INFO L225 Difference]: With dead ends: 1020 [2023-11-23 22:34:07,264 INFO L226 Difference]: Without dead ends: 813 [2023-11-23 22:34:07,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:07,269 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 1200 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:07,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 2627 Invalid, 665 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [383 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 22:34:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-11-23 22:34:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 802. [2023-11-23 22:34:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 532 states have (on average 1.5902255639097744) internal successors, (846), 535 states have internal predecessors, (846), 264 states have call successors, (264), 5 states have call predecessors, (264), 5 states have return successors, (264), 261 states have call predecessors, (264), 264 states have call successors, (264) [2023-11-23 22:34:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1374 transitions. [2023-11-23 22:34:07,448 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1374 transitions. Word has length 469 [2023-11-23 22:34:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1374 transitions. [2023-11-23 22:34:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1374 transitions. [2023-11-23 22:34:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-23 22:34:07,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:07,457 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:07,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:07,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2074952662, now seen corresponding path program 1 times [2023-11-23 22:34:07,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:07,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557570467] [2023-11-23 22:34:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:07,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483878638] [2023-11-23 22:34:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:07,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:07,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:34:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:08,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:34:08,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:08,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:08,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:08,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557570467] [2023-11-23 22:34:08,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:08,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483878638] [2023-11-23 22:34:08,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483878638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:08,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:34:08,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122812432] [2023-11-23 22:34:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:34:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:34:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:08,301 INFO L87 Difference]: Start difference. First operand 802 states and 1374 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:09,704 INFO L93 Difference]: Finished difference Result 2817 states and 4801 transitions. [2023-11-23 22:34:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:34:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 469 [2023-11-23 22:34:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:09,727 INFO L225 Difference]: With dead ends: 2817 [2023-11-23 22:34:09,727 INFO L226 Difference]: Without dead ends: 2016 [2023-11-23 22:34:09,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:09,734 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 700 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:09,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1504 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 22:34:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2023-11-23 22:34:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1557. [2023-11-23 22:34:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1030 states have (on average 1.5747572815533981) internal successors, (1622), 1038 states have internal predecessors, (1622), 515 states have call successors, (515), 11 states have call predecessors, (515), 11 states have return successors, (515), 507 states have call predecessors, (515), 515 states have call successors, (515) [2023-11-23 22:34:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2652 transitions. [2023-11-23 22:34:10,068 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2652 transitions. Word has length 469 [2023-11-23 22:34:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:10,069 INFO L495 AbstractCegarLoop]: Abstraction has 1557 states and 2652 transitions. [2023-11-23 22:34:10,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2652 transitions. [2023-11-23 22:34:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-23 22:34:10,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:10,077 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:10,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:10,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:10,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:10,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash -448506221, now seen corresponding path program 1 times [2023-11-23 22:34:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050000615] [2023-11-23 22:34:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:10,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:10,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696892898] [2023-11-23 22:34:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:10,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:10,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:10,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:34:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:10,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:10,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:10,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:10,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:10,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050000615] [2023-11-23 22:34:10,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:10,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696892898] [2023-11-23 22:34:10,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696892898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:10,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:10,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924068585] [2023-11-23 22:34:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:10,831 INFO L87 Difference]: Start difference. First operand 1557 states and 2652 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:11,124 INFO L93 Difference]: Finished difference Result 4483 states and 7642 transitions. [2023-11-23 22:34:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 470 [2023-11-23 22:34:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:11,151 INFO L225 Difference]: With dead ends: 4483 [2023-11-23 22:34:11,151 INFO L226 Difference]: Without dead ends: 2927 [2023-11-23 22:34:11,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:11,163 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 246 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:11,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 687 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2023-11-23 22:34:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2919. [2023-11-23 22:34:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 1983 states have (on average 1.583459404942007) internal successors, (3140), 2002 states have internal predecessors, (3140), 913 states have call successors, (913), 22 states have call predecessors, (913), 22 states have return successors, (913), 894 states have call predecessors, (913), 913 states have call successors, (913) [2023-11-23 22:34:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 4966 transitions. [2023-11-23 22:34:11,672 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 4966 transitions. Word has length 470 [2023-11-23 22:34:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:11,673 INFO L495 AbstractCegarLoop]: Abstraction has 2919 states and 4966 transitions. [2023-11-23 22:34:11,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 4966 transitions. [2023-11-23 22:34:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-23 22:34:11,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:11,682 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:11,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:11,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:11,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1832854863, now seen corresponding path program 1 times [2023-11-23 22:34:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:11,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363434131] [2023-11-23 22:34:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:11,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:11,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348983360] [2023-11-23 22:34:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:11,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:11,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:11,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:34:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:12,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:12,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:12,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363434131] [2023-11-23 22:34:12,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348983360] [2023-11-23 22:34:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348983360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:12,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837112615] [2023-11-23 22:34:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:12,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:12,424 INFO L87 Difference]: Start difference. First operand 2919 states and 4966 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:12,755 INFO L93 Difference]: Finished difference Result 6243 states and 10563 transitions. [2023-11-23 22:34:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 470 [2023-11-23 22:34:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:12,784 INFO L225 Difference]: With dead ends: 6243 [2023-11-23 22:34:12,784 INFO L226 Difference]: Without dead ends: 3325 [2023-11-23 22:34:12,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:12,797 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 233 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:12,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 694 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2023-11-23 22:34:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3312. [2023-11-23 22:34:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 2193 states have (on average 1.5540355677154583) internal successors, (3408), 2215 states have internal predecessors, (3408), 1083 states have call successors, (1083), 35 states have call predecessors, (1083), 35 states have return successors, (1083), 1061 states have call predecessors, (1083), 1083 states have call successors, (1083) [2023-11-23 22:34:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 5574 transitions. [2023-11-23 22:34:13,296 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 5574 transitions. Word has length 470 [2023-11-23 22:34:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:13,298 INFO L495 AbstractCegarLoop]: Abstraction has 3312 states and 5574 transitions. [2023-11-23 22:34:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 5574 transitions. [2023-11-23 22:34:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-23 22:34:13,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:13,328 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:13,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:13,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:13,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:13,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2054881483, now seen corresponding path program 1 times [2023-11-23 22:34:13,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:13,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926365860] [2023-11-23 22:34:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:13,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:13,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075556731] [2023-11-23 22:34:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:13,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:13,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:13,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:13,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:34:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:13,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:13,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:14,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926365860] [2023-11-23 22:34:14,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075556731] [2023-11-23 22:34:14,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075556731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:14,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004274377] [2023-11-23 22:34:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:14,031 INFO L87 Difference]: Start difference. First operand 3312 states and 5574 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:14,652 INFO L93 Difference]: Finished difference Result 9792 states and 16474 transitions. [2023-11-23 22:34:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 470 [2023-11-23 22:34:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:14,712 INFO L225 Difference]: With dead ends: 9792 [2023-11-23 22:34:14,712 INFO L226 Difference]: Without dead ends: 6534 [2023-11-23 22:34:14,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:14,732 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 330 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:14,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 948 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2023-11-23 22:34:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 6532. [2023-11-23 22:34:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 4329 states have (on average 1.541002541002541) internal successors, (6671), 4372 states have internal predecessors, (6671), 2132 states have call successors, (2132), 70 states have call predecessors, (2132), 70 states have return successors, (2132), 2089 states have call predecessors, (2132), 2132 states have call successors, (2132) [2023-11-23 22:34:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 10935 transitions. [2023-11-23 22:34:15,896 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 10935 transitions. Word has length 470 [2023-11-23 22:34:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:15,898 INFO L495 AbstractCegarLoop]: Abstraction has 6532 states and 10935 transitions. [2023-11-23 22:34:15,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 10935 transitions. [2023-11-23 22:34:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-23 22:34:15,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:15,909 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:15,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:16,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:16,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1033813129, now seen corresponding path program 1 times [2023-11-23 22:34:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164191776] [2023-11-23 22:34:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:16,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:16,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479478082] [2023-11-23 22:34:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:16,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:16,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:34:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:16,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:34:16,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5162 proven. 78 refuted. 0 times theorem prover too weak. 5860 trivial. 0 not checked. [2023-11-23 22:34:17,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:18,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164191776] [2023-11-23 22:34:18,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:18,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479478082] [2023-11-23 22:34:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479478082] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:18,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-23 22:34:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448949209] [2023-11-23 22:34:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:18,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:34:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:18,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:34:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:18,542 INFO L87 Difference]: Start difference. First operand 6532 states and 10935 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:20,428 INFO L93 Difference]: Finished difference Result 21200 states and 35249 transitions. [2023-11-23 22:34:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:34:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 470 [2023-11-23 22:34:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:20,539 INFO L225 Difference]: With dead ends: 21200 [2023-11-23 22:34:20,541 INFO L226 Difference]: Without dead ends: 14722 [2023-11-23 22:34:20,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:34:20,572 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 373 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:20,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1454 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14722 states. [2023-11-23 22:34:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14722 to 12336. [2023-11-23 22:34:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12336 states, 7965 states have (on average 1.5157564344005021) internal successors, (12073), 8050 states have internal predecessors, (12073), 4230 states have call successors, (4230), 140 states have call predecessors, (4230), 140 states have return successors, (4230), 4145 states have call predecessors, (4230), 4230 states have call successors, (4230) [2023-11-23 22:34:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12336 states to 12336 states and 20533 transitions. [2023-11-23 22:34:22,870 INFO L78 Accepts]: Start accepts. Automaton has 12336 states and 20533 transitions. Word has length 470 [2023-11-23 22:34:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:22,872 INFO L495 AbstractCegarLoop]: Abstraction has 12336 states and 20533 transitions. [2023-11-23 22:34:22,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 12336 states and 20533 transitions. [2023-11-23 22:34:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-23 22:34:22,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:22,886 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:22,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:23,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:23,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:23,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2006903782, now seen corresponding path program 1 times [2023-11-23 22:34:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48850714] [2023-11-23 22:34:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:23,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541738290] [2023-11-23 22:34:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:23,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:23,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:23,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:23,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:34:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:23,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:34:23,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 2202 proven. 198 refuted. 0 times theorem prover too weak. 8700 trivial. 0 not checked. [2023-11-23 22:34:24,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-23 22:34:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:24,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48850714] [2023-11-23 22:34:24,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:24,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541738290] [2023-11-23 22:34:24,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541738290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:24,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:24,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-23 22:34:24,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570459658] [2023-11-23 22:34:24,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:34:24,838 INFO L87 Difference]: Start difference. First operand 12336 states and 20533 transitions. Second operand has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) [2023-11-23 22:34:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:26,618 INFO L93 Difference]: Finished difference Result 25286 states and 41549 transitions. [2023-11-23 22:34:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) Word has length 471 [2023-11-23 22:34:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:26,685 INFO L225 Difference]: With dead ends: 25286 [2023-11-23 22:34:26,686 INFO L226 Difference]: Without dead ends: 13004 [2023-11-23 22:34:26,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:34:26,741 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 251 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:26,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 658 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13004 states. [2023-11-23 22:34:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13004 to 12724. [2023-11-23 22:34:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12724 states, 8256 states have (on average 1.491763565891473) internal successors, (12316), 8341 states have internal predecessors, (12316), 4230 states have call successors, (4230), 237 states have call predecessors, (4230), 237 states have return successors, (4230), 4145 states have call predecessors, (4230), 4230 states have call successors, (4230) [2023-11-23 22:34:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12724 states to 12724 states and 20776 transitions. [2023-11-23 22:34:28,919 INFO L78 Accepts]: Start accepts. Automaton has 12724 states and 20776 transitions. Word has length 471 [2023-11-23 22:34:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:28,921 INFO L495 AbstractCegarLoop]: Abstraction has 12724 states and 20776 transitions. [2023-11-23 22:34:28,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) [2023-11-23 22:34:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12724 states and 20776 transitions. [2023-11-23 22:34:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-23 22:34:28,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:28,933 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:28,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:29,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:29,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:29,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:29,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1608005144, now seen corresponding path program 1 times [2023-11-23 22:34:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:29,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305946342] [2023-11-23 22:34:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:29,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022778995] [2023-11-23 22:34:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:29,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:29,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:29,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:34:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:29,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:34:29,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:30,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:30,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:30,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305946342] [2023-11-23 22:34:30,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:30,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022778995] [2023-11-23 22:34:30,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022778995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:30,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125795686] [2023-11-23 22:34:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:30,330 INFO L87 Difference]: Start difference. First operand 12724 states and 20776 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:32,351 INFO L93 Difference]: Finished difference Result 32503 states and 53244 transitions. [2023-11-23 22:34:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 471 [2023-11-23 22:34:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:32,445 INFO L225 Difference]: With dead ends: 32503 [2023-11-23 22:34:32,445 INFO L226 Difference]: Without dead ends: 19837 [2023-11-23 22:34:32,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:32,490 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 128 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:32,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 683 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:34:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19837 states. [2023-11-23 22:34:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19837 to 19835. [2023-11-23 22:34:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19835 states, 13106 states have (on average 1.5086220051884633) internal successors, (19772), 13232 states have internal predecessors, (19772), 6369 states have call successors, (6369), 359 states have call predecessors, (6369), 359 states have return successors, (6369), 6243 states have call predecessors, (6369), 6369 states have call successors, (6369) [2023-11-23 22:34:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19835 states to 19835 states and 32510 transitions. [2023-11-23 22:34:35,082 INFO L78 Accepts]: Start accepts. Automaton has 19835 states and 32510 transitions. Word has length 471 [2023-11-23 22:34:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:35,083 INFO L495 AbstractCegarLoop]: Abstraction has 19835 states and 32510 transitions. [2023-11-23 22:34:35,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-23 22:34:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 19835 states and 32510 transitions. [2023-11-23 22:34:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-23 22:34:35,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:35,095 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:35,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:35,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:35,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1205220949, now seen corresponding path program 1 times [2023-11-23 22:34:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:35,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301273025] [2023-11-23 22:34:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:35,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:35,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:34:35,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932387546] [2023-11-23 22:34:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:35,382 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:35,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe1ae563-9fcf-41fe-96c9-a28d8bb3d4d9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:34:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:35,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:34:35,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5568 proven. 99 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2023-11-23 22:34:36,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-23 22:34:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301273025] [2023-11-23 22:34:37,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:34:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932387546] [2023-11-23 22:34:37,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932387546] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:37,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:37,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-23 22:34:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787880954] [2023-11-23 22:34:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:34:37,303 INFO L87 Difference]: Start difference. First operand 19835 states and 32510 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75)