./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx --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 bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:56,712 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:56,803 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:22:56,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:56,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:56,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:56,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:56,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:56,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:22:56,859 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:22:56,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:56,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:56,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:56,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:56,864 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:56,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:56,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:22:56,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:56,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:56,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:56,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:56,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:22:56,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:56,869 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:22:56,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:56,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:22:56,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:56,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:56,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:56,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:56,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:56,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:56,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:56,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:56,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:22:56,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:56,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:56,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:56,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:56,875 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:22:56,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:56,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:56,876 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_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 [2023-11-21 22:22:57,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:57,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:57,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:57,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:57,187 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:57,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2023-11-21 22:23:00,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:23:00,595 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:23:00,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2023-11-21 22:23:00,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/data/ed86fff2a/1933a7ab6d9f4cafa400a1dcecd1ccc3/FLAGef4b2bdfe [2023-11-21 22:23:00,631 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/data/ed86fff2a/1933a7ab6d9f4cafa400a1dcecd1ccc3 [2023-11-21 22:23:00,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:23:00,641 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:23:00,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:00,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:23:00,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:23:00,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:00" (1/1) ... [2023-11-21 22:23:00,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2659521d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:00, skipping insertion in model container [2023-11-21 22:23:00,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:00" (1/1) ... [2023-11-21 22:23:00,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:23:00,921 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_a3b6561f-a8b3-47d3-846e-3e3f671109c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2023-11-21 22:23:00,953 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_a3b6561f-a8b3-47d3-846e-3e3f671109c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2023-11-21 22:23:00,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:00,967 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:23:00,982 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_a3b6561f-a8b3-47d3-846e-3e3f671109c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2023-11-21 22:23:00,994 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_a3b6561f-a8b3-47d3-846e-3e3f671109c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2023-11-21 22:23:00,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:01,011 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:23:01,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01 WrapperNode [2023-11-21 22:23:01,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:01,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:01,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:23:01,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:23:01,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,055 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-11-21 22:23:01,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:01,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:23:01,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:23:01,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:23:01,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,073 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,084 INFO L187 HeapSplitter]: Split 10 memory accesses to 2 slices as follows [2, 8] [2023-11-21 22:23:01,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:23:01,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:23:01,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:23:01,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:23:01,104 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:01,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:01,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:23:01,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:23:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-21 22:23:01,182 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-21 22:23:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-21 22:23:01,183 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-21 22:23:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:23:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:23:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:23:01,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:23:01,280 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:23:01,283 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:23:01,637 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:23:01,734 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:23:01,734 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:23:01,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:01 BoogieIcfgContainer [2023-11-21 22:23:01,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:23:01,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:23:01,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:23:01,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:23:01,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:23:00" (1/3) ... [2023-11-21 22:23:01,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f82d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:01, skipping insertion in model container [2023-11-21 22:23:01,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01" (2/3) ... [2023-11-21 22:23:01,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f82d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:01, skipping insertion in model container [2023-11-21 22:23:01,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:01" (3/3) ... [2023-11-21 22:23:01,746 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_3.i [2023-11-21 22:23:01,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:23:01,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:23:01,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:23:01,810 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;@1725b94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:23:01,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:23:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:23:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:23:01,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:01,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:23:01,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:01,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -477294563, now seen corresponding path program 1 times [2023-11-21 22:23:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:01,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726355163] [2023-11-21 22:23:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:01,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:23:01,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710442963] [2023-11-21 22:23:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:01,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:01,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:01,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:01,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:23:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:02,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:23:02,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:02,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:23:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726355163] [2023-11-21 22:23:02,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:23:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710442963] [2023-11-21 22:23:02,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710442963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:02,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:02,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:23:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709551593] [2023-11-21 22:23:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:02,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:02,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:02,171 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:02,218 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-11-21 22:23:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 22:23:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:02,227 INFO L225 Difference]: With dead ends: 37 [2023-11-21 22:23:02,228 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 22:23:02,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:02,234 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:02,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:23:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 22:23:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 22:23:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:23:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-21 22:23:02,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-11-21 22:23:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:02,271 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-21 22:23:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-21 22:23:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:23:02,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:02,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:02,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:02,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:23:02,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:02,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1913486975, now seen corresponding path program 1 times [2023-11-21 22:23:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:02,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516018408] [2023-11-21 22:23:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:02,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:02,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:23:02,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862128066] [2023-11-21 22:23:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:02,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:02,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:23:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:02,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:23:02,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:02,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:23:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:02,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516018408] [2023-11-21 22:23:02,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:23:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862128066] [2023-11-21 22:23:02,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862128066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:23:02,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:23:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-21 22:23:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456121232] [2023-11-21 22:23:02,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:23:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:23:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:23:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:23:02,741 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:02,844 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-21 22:23:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:23:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:23:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:02,846 INFO L225 Difference]: With dead ends: 28 [2023-11-21 22:23:02,846 INFO L226 Difference]: Without dead ends: 25 [2023-11-21 22:23:02,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:23:02,848 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:02,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:23:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-21 22:23:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-21 22:23:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:23:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-21 22:23:02,856 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-11-21 22:23:02,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:02,856 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-21 22:23:02,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-21 22:23:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:23:02,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:02,857 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:02,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:03,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:03,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash 809188509, now seen corresponding path program 2 times [2023-11-21 22:23:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:03,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706187500] [2023-11-21 22:23:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:03,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:23:03,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946375969] [2023-11-21 22:23:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:23:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:03,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:03,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b6561f-a8b3-47d3-846e-3e3f671109c4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:23:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:23:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:23:12,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 22:23:12,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:23:15,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:00,085 WARN L876 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse24 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse31 (mod (+ .cse24 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse32 (mod (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse4 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse6 (= .cse32 0)) (.cse7 (= |c_ULTIMATE.start_main1_~y~0#1| .cse32)) (.cse30 (+ |c_ULTIMATE.start_main1_~y~0#1| 256)) (.cse14 (= .cse31 0)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse8 (< 0 .cse22)) (.cse16 (= |c_ULTIMATE.start_main1_~y~0#1| .cse31))) (let ((.cse13 (< 127 .cse31)) (.cse17 (or .cse14 .cse15 .cse8 .cse16)) (.cse19 (< 127 .cse32)) (.cse2 (< .cse32 128)) (.cse20 (= .cse32 .cse30)) (.cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256) 0))) (.cse9 (= .cse31 .cse30)) (.cse12 (< .cse31 128)) (.cse10 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse31)) 256) 0))) (.cse11 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse1 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse18 (or .cse4 .cse6 .cse7 .cse8)) (.cse23 (mod .cse24 256))) (and (or (let ((.cse5 (= .cse24 0))) (let ((.cse3 (or (and (<= .cse22 0) (not .cse5)) (= |c_ULTIMATE.start_main1_~y~0#1| .cse23) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0)) (= .cse23 0)))) (let ((.cse0 (and (or .cse5 .cse20 .cse21 .cse8) .cse3))) (and (or (and (or .cse0 .cse1 .cse2) (or (and .cse3 (or .cse4 .cse5 .cse6 .cse7 .cse8)) .cse1) (or (and .cse3 (or .cse5 .cse9 .cse10 .cse8)) .cse11)) .cse12) (or .cse13 (and (or (and (or (and .cse3 (or .cse5 .cse14 .cse15 .cse8 .cse16)) .cse11) (or .cse0 .cse1)) .cse2) (or (and (or (and .cse3 .cse17) .cse11) (or .cse1 (and .cse3 .cse18))) .cse19))))))) (< 127 .cse23)) (or (let ((.cse28 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse23)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (= .cse23 .cse30)))) (let ((.cse26 (or .cse1 (and .cse28 .cse18))) (.cse29 (or (and (or .cse9 .cse12 .cse10 .cse8) .cse28) .cse11)) (.cse27 (or .cse1 (and (or .cse20 .cse21 .cse8) .cse28)))) (and (or .cse13 (let ((.cse25 (or .cse11 (and .cse28 .cse17)))) (and (or (and .cse25 .cse26) .cse19) (or (and .cse25 .cse27) .cse2)))) (or (and .cse29 .cse26) .cse19) (or (and .cse29 .cse27) .cse2)))) (< .cse23 128)))))))) is different from true