./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:13:42,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:13:42,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:13:42,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:13:42,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:13:42,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:13:42,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:13:42,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:13:42,671 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:13:42,672 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:13:42,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:13:42,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:13:42,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:13:42,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:13:42,675 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:13:42,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:13:42,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:13:42,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:13:42,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:13:42,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:13:42,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:13:42,681 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:13:42,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:13:42,682 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:13:42,683 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:13:42,683 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:13:42,684 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:13:42,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:13:42,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:13:42,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:13:42,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:13:42,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:42,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:13:42,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:13:42,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:13:42,688 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:13:42,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:13:42,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:13:42,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:13:42,689 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:13:42,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:13:42,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:13:42,691 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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2023-11-21 22:13:43,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:13:43,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:13:43,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:13:43,044 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:13:43,044 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:13:43,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-11-21 22:13:46,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:13:46,386 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:13:46,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/sv-benchmarks/c/verifythis/prefixsum_rec.c [2023-11-21 22:13:46,398 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/data/a801ff8a0/3fd4566326e14f2d9edd7e0c98519d66/FLAGb12751ffc [2023-11-21 22:13:46,416 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/data/a801ff8a0/3fd4566326e14f2d9edd7e0c98519d66 [2023-11-21 22:13:46,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:13:46,426 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:13:46,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:46,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:13:46,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:13:46,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fee279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46, skipping insertion in model container [2023-11-21 22:13:46,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:13:46,715 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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2023-11-21 22:13:46,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:46,762 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:13:46,777 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_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2023-11-21 22:13:46,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:46,811 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:13:46,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46 WrapperNode [2023-11-21 22:13:46,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:46,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:46,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:13:46,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:13:46,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,857 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-21 22:13:46,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:46,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:13:46,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:13:46,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:13:46,871 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,875 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,901 INFO L187 HeapSplitter]: Split 15 memory accesses to 2 slices as follows [2, 13] [2023-11-21 22:13:46,903 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:13:46,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:13:46,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:13:46,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:13:46,942 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (1/1) ... [2023-11-21 22:13:46,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:46,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:13:47,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:13:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:13:47,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:13:47,045 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:13:47,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:13:47,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:13:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2023-11-21 22:13:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2023-11-21 22:13:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:13:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:13:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:13:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2023-11-21 22:13:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2023-11-21 22:13:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:13:47,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:13:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:13:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:13:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-21 22:13:47,051 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-21 22:13:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:13:47,202 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:13:47,205 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:13:47,492 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:13:47,578 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:13:47,578 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:13:47,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:47 BoogieIcfgContainer [2023-11-21 22:13:47,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:13:47,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:13:47,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:13:47,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:13:47,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:13:46" (1/3) ... [2023-11-21 22:13:47,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a122d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:47, skipping insertion in model container [2023-11-21 22:13:47,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:46" (2/3) ... [2023-11-21 22:13:47,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a122d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:47, skipping insertion in model container [2023-11-21 22:13:47,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:47" (3/3) ... [2023-11-21 22:13:47,591 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2023-11-21 22:13:47,610 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:13:47,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:13:47,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:13:47,673 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;@550e1854, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:13:47,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:13:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:13:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:13:47,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:47,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:47,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:47,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1207210361, now seen corresponding path program 1 times [2023-11-21 22:13:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:47,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335309125] [2023-11-21 22:13:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:13:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:13:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:13:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:13:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:13:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:13:48,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:48,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335309125] [2023-11-21 22:13:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335309125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:48,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:13:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910619931] [2023-11-21 22:13:48,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:13:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:13:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:48,713 INFO L87 Difference]: Start difference. First operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:13:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:48,966 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-11-21 22:13:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:13:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-11-21 22:13:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:48,976 INFO L225 Difference]: With dead ends: 53 [2023-11-21 22:13:48,977 INFO L226 Difference]: Without dead ends: 41 [2023-11-21 22:13:48,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:13:48,983 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:48,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-21 22:13:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-21 22:13:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:13:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-11-21 22:13:49,027 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 34 [2023-11-21 22:13:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:49,028 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-11-21 22:13:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:13:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-11-21 22:13:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 22:13:49,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:49,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:13:49,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:49,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:49,034 INFO L85 PathProgramCache]: Analyzing trace with hash -545037252, now seen corresponding path program 1 times [2023-11-21 22:13:49,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:49,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488957084] [2023-11-21 22:13:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:13:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:13:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:13:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:13:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:13:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:49,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:49,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488957084] [2023-11-21 22:13:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488957084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729083754] [2023-11-21 22:13:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:49,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:49,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:49,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:49,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:13:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:49,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:13:49,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:49,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729083754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:49,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:49,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-11-21 22:13:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881752378] [2023-11-21 22:13:49,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:49,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:13:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:13:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:13:49,889 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-21 22:13:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:50,053 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-11-21 22:13:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:13:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 35 [2023-11-21 22:13:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:50,055 INFO L225 Difference]: With dead ends: 64 [2023-11-21 22:13:50,056 INFO L226 Difference]: Without dead ends: 41 [2023-11-21 22:13:50,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:13:50,058 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:50,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 128 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-21 22:13:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-21 22:13:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:13:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-21 22:13:50,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 35 [2023-11-21 22:13:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:50,069 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-21 22:13:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-21 22:13:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-21 22:13:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:13:50,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:50,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:50,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:50,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:50,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash 969861593, now seen corresponding path program 2 times [2023-11-21 22:13:50,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:50,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555781352] [2023-11-21 22:13:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:13:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:13:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:13:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:13:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:13:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:53,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555781352] [2023-11-21 22:13:53,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555781352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:53,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576317558] [2023-11-21 22:13:53,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:13:53,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:53,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:53,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:13:53,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:13:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:53,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 22:13:53,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:53,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-21 22:13:53,584 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= |c_downsweep_#in~right| (+ downsweep_~left 1)) (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (let ((.cse3 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4))) (.cse2 (select .cse0 .cse1))) (store (store .cse0 .cse1 (+ .cse2 (select .cse0 .cse3))) .cse3 .cse2))))))) is different from true [2023-11-21 22:13:53,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:13:53,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2023-11-21 22:13:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:13:53,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:54,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576317558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:54,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:13:54,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2023-11-21 22:13:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099380481] [2023-11-21 22:13:54,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-21 22:13:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-21 22:13:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=893, Unknown=1, NotChecked=60, Total=1056 [2023-11-21 22:13:54,239 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-21 22:13:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:57,184 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2023-11-21 22:13:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-21 22:13:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 36 [2023-11-21 22:13:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:57,188 INFO L225 Difference]: With dead ends: 87 [2023-11-21 22:13:57,189 INFO L226 Difference]: Without dead ends: 85 [2023-11-21 22:13:57,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=476, Invalid=3067, Unknown=1, NotChecked=116, Total=3660 [2023-11-21 22:13:57,192 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:57,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 301 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 723 Invalid, 0 Unknown, 106 Unchecked, 1.1s Time] [2023-11-21 22:13:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-21 22:13:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2023-11-21 22:13:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 12 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2023-11-21 22:13:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2023-11-21 22:13:57,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 36 [2023-11-21 22:13:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:57,213 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2023-11-21 22:13:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-21 22:13:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2023-11-21 22:13:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:13:57,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:57,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:57,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:57,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:57,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:57,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 906772498, now seen corresponding path program 1 times [2023-11-21 22:13:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505762154] [2023-11-21 22:13:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:13:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:13:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:13:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:13:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:13:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:13:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505762154] [2023-11-21 22:13:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505762154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891699295] [2023-11-21 22:13:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:57,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:57,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 119 conjunts are in the unsatisfiable core [2023-11-21 22:13:57,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:57,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:13:57,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-21 22:13:58,020 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-21 22:13:58,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-21 22:13:58,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-21 22:13:58,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-21 22:13:58,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2023-11-21 22:13:58,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-11-21 22:13:58,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2023-11-21 22:13:58,500 WARN L876 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ (* upsweep_~right 4) |c_upsweep_#in~a.offset|))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)))) is different from true [2023-11-21 22:13:58,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2023-11-21 22:13:58,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-11-21 22:13:58,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2023-11-21 22:13:59,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2023-11-21 22:13:59,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:13:59,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2023-11-21 22:13:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:59,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:00,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891699295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:00,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:14:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 23] total 29 [2023-11-21 22:14:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174651545] [2023-11-21 22:14:00,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:00,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-21 22:14:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-21 22:14:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1030, Unknown=1, NotChecked=64, Total=1190 [2023-11-21 22:14:00,016 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 29 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-21 22:14:01,896 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1|) 1)) (exists ((upsweep_~right Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ (* upsweep_~right 4) |c_upsweep_#in~a.offset|))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))) (<= upsweep_~right (+ |c_upsweep_#in~left| 1))))) is different from true [2023-11-21 22:14:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:03,508 INFO L93 Difference]: Finished difference Result 145 states and 200 transitions. [2023-11-21 22:14:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-21 22:14:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 39 [2023-11-21 22:14:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:03,512 INFO L225 Difference]: With dead ends: 145 [2023-11-21 22:14:03,512 INFO L226 Difference]: Without dead ends: 115 [2023-11-21 22:14:03,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=403, Invalid=3893, Unknown=2, NotChecked=258, Total=4556 [2023-11-21 22:14:03,517 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 110 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:03,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 643 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1257 Invalid, 0 Unknown, 333 Unchecked, 1.5s Time] [2023-11-21 22:14:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-21 22:14:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2023-11-21 22:14:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 21 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (39), 22 states have call predecessors, (39), 21 states have call successors, (39) [2023-11-21 22:14:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2023-11-21 22:14:03,550 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 39 [2023-11-21 22:14:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:03,551 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2023-11-21 22:14:03,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-21 22:14:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2023-11-21 22:14:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:14:03,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:03,555 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:03,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:03,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:03,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -843993297, now seen corresponding path program 2 times [2023-11-21 22:14:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:03,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678794088] [2023-11-21 22:14:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:14:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:14:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:14:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:04,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:14:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678794088] [2023-11-21 22:14:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678794088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536504306] [2023-11-21 22:14:04,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:14:04,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:04,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:04,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:14:04,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:14:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:14:04,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:14:04,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:04,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536504306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:04,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2023-11-21 22:14:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533070720] [2023-11-21 22:14:04,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:04,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:14:04,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:14:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:14:04,473 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:14:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:04,866 INFO L93 Difference]: Finished difference Result 111 states and 151 transitions. [2023-11-21 22:14:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:14:04,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 40 [2023-11-21 22:14:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:04,869 INFO L225 Difference]: With dead ends: 111 [2023-11-21 22:14:04,870 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 22:14:04,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:14:04,872 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:04,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:14:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 22:14:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2023-11-21 22:14:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 20 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (35), 21 states have call predecessors, (35), 20 states have call successors, (35) [2023-11-21 22:14:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-11-21 22:14:04,907 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 40 [2023-11-21 22:14:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:04,908 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-11-21 22:14:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:14:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-11-21 22:14:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:14:04,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:04,912 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:04,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:05,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:05,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:05,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1417801895, now seen corresponding path program 1 times [2023-11-21 22:14:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850068285] [2023-11-21 22:14:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:14:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:14:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:14:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:14:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:14:05,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:05,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850068285] [2023-11-21 22:14:05,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850068285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991131679] [2023-11-21 22:14:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:05,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:05,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:05,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:05,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:14:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:05,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:14:05,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:14:05,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:14:05,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991131679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:05,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:05,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-21 22:14:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310710104] [2023-11-21 22:14:05,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:14:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:14:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:14:05,800 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:14:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:06,043 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2023-11-21 22:14:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:14:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-11-21 22:14:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:06,046 INFO L225 Difference]: With dead ends: 104 [2023-11-21 22:14:06,046 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 22:14:06,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:14:06,048 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:06,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 277 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:14:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 22:14:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2023-11-21 22:14:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 states have internal predecessors, (66), 20 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (34), 21 states have call predecessors, (34), 20 states have call successors, (34) [2023-11-21 22:14:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2023-11-21 22:14:06,079 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 43 [2023-11-21 22:14:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:06,080 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2023-11-21 22:14:06,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 22:14:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2023-11-21 22:14:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:14:06,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:06,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:06,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:14:06,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:06,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1203629674, now seen corresponding path program 1 times [2023-11-21 22:14:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440878290] [2023-11-21 22:14:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:14:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:14:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:14:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:14:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:14:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440878290] [2023-11-21 22:14:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440878290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372084633] [2023-11-21 22:14:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:06,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:06,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:06,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:14:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:14:06,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:14:06,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:14:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372084633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:07,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-21 22:14:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923806107] [2023-11-21 22:14:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:14:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:14:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:14:07,384 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-21 22:14:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:07,937 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2023-11-21 22:14:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:14:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2023-11-21 22:14:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:07,940 INFO L225 Difference]: With dead ends: 105 [2023-11-21 22:14:07,940 INFO L226 Difference]: Without dead ends: 86 [2023-11-21 22:14:07,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:14:07,942 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:07,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 183 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:14:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-21 22:14:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2023-11-21 22:14:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 54 states have internal predecessors, (60), 20 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (34), 20 states have call predecessors, (34), 20 states have call successors, (34) [2023-11-21 22:14:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2023-11-21 22:14:07,971 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 48 [2023-11-21 22:14:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:07,971 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2023-11-21 22:14:07,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-21 22:14:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2023-11-21 22:14:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:14:07,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:07,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:08,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:08,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:08,189 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:08,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash 260171166, now seen corresponding path program 1 times [2023-11-21 22:14:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:08,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670492965] [2023-11-21 22:14:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:14:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:14:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:14:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:14:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:14:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670492965] [2023-11-21 22:14:08,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670492965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810856100] [2023-11-21 22:14:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:08,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:14:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:08,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:14:08,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:14:08,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:14:09,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810856100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:09,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:09,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2023-11-21 22:14:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991986310] [2023-11-21 22:14:09,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:09,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:14:09,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:14:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:14:09,117 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:14:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:09,324 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2023-11-21 22:14:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:14:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 51 [2023-11-21 22:14:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:09,327 INFO L225 Difference]: With dead ends: 92 [2023-11-21 22:14:09,327 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 22:14:09,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:14:09,329 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:09,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 215 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:14:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 22:14:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-11-21 22:14:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-21 22:14:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-21 22:14:09,341 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 51 [2023-11-21 22:14:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:09,342 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-21 22:14:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:14:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-21 22:14:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-21 22:14:09,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:09,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:09,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:09,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:09,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:09,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -367619867, now seen corresponding path program 1 times [2023-11-21 22:14:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:09,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42147195] [2023-11-21 22:14:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:14:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:14:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:14:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:14:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:14:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:14:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:14:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 22:14:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42147195] [2023-11-21 22:14:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42147195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761444072] [2023-11-21 22:14:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:10,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:10,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c17ee25-33b8-41ac-8a57-b13a4bb118a0/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:14:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:10,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-21 22:14:10,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:10,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:14:10,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-21 22:14:10,403 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-21 22:14:10,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-21 22:14:10,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-21 22:14:10,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-21 22:14:10,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-21 22:14:10,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-21 22:14:11,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-11-21 22:14:11,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-21 22:14:11,468 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2023-11-21 22:14:11,701 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~right Int) (downsweep_~a.offset Int)) (and (<= |c_downsweep_#in~right| downsweep_~right) (= (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ downsweep_~a.offset (* downsweep_~left 4)))) (store (let ((.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|)) (.cse1 (+ downsweep_~a.offset (* downsweep_~right 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse2) (select .cse0 .cse1)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2)))) |c_#memory_int#1|) (<= |c_downsweep_#in~left| downsweep_~left) (<= |c_downsweep_#in~a.offset| downsweep_~a.offset))) is different from true [2023-11-21 22:14:12,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 277 [2023-11-21 22:14:35,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1982 treesize of output 1862 [2023-11-21 22:14:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 9 not checked. [2023-11-21 22:14:36,377 INFO L327 TraceCheckSpWp]: Computing backward predicates...