./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya --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 e62ccb0fc84e02c2612dc59055080745daed8f4191db2e50cfaef22450b67629 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:48:08,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:48:08,595 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:48:08,600 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:48:08,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:48:08,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:48:08,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:48:08,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:48:08,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:48:08,628 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:48:08,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:48:08,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:48:08,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:48:08,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:48:08,631 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:48:08,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:48:08,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:48:08,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:48:08,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:48:08,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:48:08,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:48:08,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:48:08,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:48:08,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:48:08,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:48:08,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:48:08,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:48:08,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:48:08,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:48:08,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:48:08,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:48:08,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:08,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:48:08,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:48:08,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:48:08,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:48:08,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:48:08,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:48:08,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:48:08,643 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:48:08,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:48:08,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:48:08,644 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_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62ccb0fc84e02c2612dc59055080745daed8f4191db2e50cfaef22450b67629 [2023-11-29 00:48:08,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:48:08,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:48:08,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:48:08,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:48:08,934 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:48:08,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i [2023-11-29 00:48:11,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:48:12,177 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:48:12,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i [2023-11-29 00:48:12,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/data/9482207c3/2bc988f8d5f3432ba8e4bb951987a749/FLAG308048850 [2023-11-29 00:48:12,205 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/data/9482207c3/2bc988f8d5f3432ba8e4bb951987a749 [2023-11-29 00:48:12,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:48:12,209 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:48:12,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:12,210 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:48:12,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:48:12,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1310f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12, skipping insertion in model container [2023-11-29 00:48:12,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:48:12,402 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_8682e6ed-2307-4cae-844c-0d190494b5fd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i[916,929] [2023-11-29 00:48:12,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:12,638 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:48:12,649 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_8682e6ed-2307-4cae-844c-0d190494b5fd/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-16.i[916,929] [2023-11-29 00:48:12,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:12,798 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:48:12,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12 WrapperNode [2023-11-29 00:48:12,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:12,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:12,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:48:12,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:48:12,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,954 INFO L138 Inliner]: procedures = 26, calls = 88, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 864 [2023-11-29 00:48:12,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:12,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:48:12,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:48:12,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:48:12,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:12,989 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,071 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:48:13,071 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,118 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:48:13,154 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:48:13,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:48:13,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:48:13,155 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (1/1) ... [2023-11-29 00:48:13,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:13,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:48:13,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:48:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:48:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:48:13,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:48:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:48:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:48:13,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:48:13,395 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:48:13,397 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:48:14,625 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:48:14,687 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:48:14,688 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:48:14,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:14 BoogieIcfgContainer [2023-11-29 00:48:14,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:48:14,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:48:14,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:48:14,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:48:14,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:48:12" (1/3) ... [2023-11-29 00:48:14,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b33b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:14, skipping insertion in model container [2023-11-29 00:48:14,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:12" (2/3) ... [2023-11-29 00:48:14,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b33b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:14, skipping insertion in model container [2023-11-29 00:48:14,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:14" (3/3) ... [2023-11-29 00:48:14,697 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-16.i [2023-11-29 00:48:14,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:48:14,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:48:14,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:48:14,780 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;@4fdc58d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:48:14,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:48:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 303 states, 225 states have (on average 1.6222222222222222) internal successors, (365), 226 states have internal predecessors, (365), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-29 00:48:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:48:14,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:14,822 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:14,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:14,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1266910157, now seen corresponding path program 1 times [2023-11-29 00:48:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470109494] [2023-11-29 00:48:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:15,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:15,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918618596] [2023-11-29 00:48:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:15,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:48:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:15,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:48:15,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:16,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470109494] [2023-11-29 00:48:16,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918618596] [2023-11-29 00:48:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918618596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:16,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:16,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129815409] [2023-11-29 00:48:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:16,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:16,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:16,767 INFO L87 Difference]: Start difference. First operand has 303 states, 225 states have (on average 1.6222222222222222) internal successors, (365), 226 states have internal predecessors, (365), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:17,341 INFO L93 Difference]: Finished difference Result 904 states and 1694 transitions. [2023-11-29 00:48:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 514 [2023-11-29 00:48:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:17,364 INFO L225 Difference]: With dead ends: 904 [2023-11-29 00:48:17,364 INFO L226 Difference]: Without dead ends: 602 [2023-11-29 00:48:17,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:17,376 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 394 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:17,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1496 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-11-29 00:48:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 438. [2023-11-29 00:48:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 285 states have (on average 1.5087719298245614) internal successors, (430), 285 states have internal predecessors, (430), 150 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-29 00:48:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 730 transitions. [2023-11-29 00:48:17,558 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 730 transitions. Word has length 514 [2023-11-29 00:48:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:17,561 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 730 transitions. [2023-11-29 00:48:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 730 transitions. [2023-11-29 00:48:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:48:17,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:17,579 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:17,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:17,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:48:17,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:17,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1069482353, now seen corresponding path program 1 times [2023-11-29 00:48:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197888764] [2023-11-29 00:48:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:17,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:17,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711225961] [2023-11-29 00:48:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:17,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:17,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:17,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:17,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:48:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:18,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:18,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:18,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197888764] [2023-11-29 00:48:18,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711225961] [2023-11-29 00:48:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711225961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:18,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:18,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:18,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223454907] [2023-11-29 00:48:18,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:18,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:18,522 INFO L87 Difference]: Start difference. First operand 438 states and 730 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:18,659 INFO L93 Difference]: Finished difference Result 1000 states and 1679 transitions. [2023-11-29 00:48:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 514 [2023-11-29 00:48:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:18,669 INFO L225 Difference]: With dead ends: 1000 [2023-11-29 00:48:18,669 INFO L226 Difference]: Without dead ends: 700 [2023-11-29 00:48:18,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:18,673 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 379 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:18,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 978 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-11-29 00:48:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 697. [2023-11-29 00:48:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 495 states have (on average 1.5636363636363637) internal successors, (774), 496 states have internal predecessors, (774), 197 states have call successors, (197), 4 states have call predecessors, (197), 4 states have return successors, (197), 196 states have call predecessors, (197), 197 states have call successors, (197) [2023-11-29 00:48:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1168 transitions. [2023-11-29 00:48:18,774 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1168 transitions. Word has length 514 [2023-11-29 00:48:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:18,777 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1168 transitions. [2023-11-29 00:48:18,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1168 transitions. [2023-11-29 00:48:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:48:18,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:18,791 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:18,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:48:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:18,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:18,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 588402095, now seen corresponding path program 1 times [2023-11-29 00:48:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:18,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232525672] [2023-11-29 00:48:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:19,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709741055] [2023-11-29 00:48:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:19,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:19,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:19,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:48:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:19,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:19,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:19,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232525672] [2023-11-29 00:48:19,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709741055] [2023-11-29 00:48:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709741055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173423268] [2023-11-29 00:48:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:19,728 INFO L87 Difference]: Start difference. First operand 697 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:19,880 INFO L93 Difference]: Finished difference Result 1799 states and 3036 transitions. [2023-11-29 00:48:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 514 [2023-11-29 00:48:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:19,895 INFO L225 Difference]: With dead ends: 1799 [2023-11-29 00:48:19,896 INFO L226 Difference]: Without dead ends: 1247 [2023-11-29 00:48:19,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:19,900 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 436 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:19,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1201 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2023-11-29 00:48:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 909. [2023-11-29 00:48:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 707 states have (on average 1.628005657708628) internal successors, (1151), 708 states have internal predecessors, (1151), 197 states have call successors, (197), 4 states have call predecessors, (197), 4 states have return successors, (197), 196 states have call predecessors, (197), 197 states have call successors, (197) [2023-11-29 00:48:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1545 transitions. [2023-11-29 00:48:20,040 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1545 transitions. Word has length 514 [2023-11-29 00:48:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:20,041 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1545 transitions. [2023-11-29 00:48:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1545 transitions. [2023-11-29 00:48:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-29 00:48:20,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:20,058 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:20,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 00:48:20,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:20,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1056700689, now seen corresponding path program 1 times [2023-11-29 00:48:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:20,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473652652] [2023-11-29 00:48:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:20,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:20,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293993798] [2023-11-29 00:48:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:20,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:20,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:20,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:48:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:20,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:20,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:20,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:20,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473652652] [2023-11-29 00:48:20,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293993798] [2023-11-29 00:48:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293993798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:20,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:20,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55690761] [2023-11-29 00:48:20,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:20,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:20,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:20,850 INFO L87 Difference]: Start difference. First operand 909 states and 1545 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:21,015 INFO L93 Difference]: Finished difference Result 2405 states and 4119 transitions. [2023-11-29 00:48:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 514 [2023-11-29 00:48:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:21,031 INFO L225 Difference]: With dead ends: 2405 [2023-11-29 00:48:21,031 INFO L226 Difference]: Without dead ends: 1655 [2023-11-29 00:48:21,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:21,035 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 482 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:21,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 985 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2023-11-29 00:48:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1653. [2023-11-29 00:48:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1327 states have (on average 1.6405425772418991) internal successors, (2177), 1329 states have internal predecessors, (2177), 319 states have call successors, (319), 6 states have call predecessors, (319), 6 states have return successors, (319), 317 states have call predecessors, (319), 319 states have call successors, (319) [2023-11-29 00:48:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2815 transitions. [2023-11-29 00:48:21,226 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2815 transitions. Word has length 514 [2023-11-29 00:48:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:21,227 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 2815 transitions. [2023-11-29 00:48:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2815 transitions. [2023-11-29 00:48:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-29 00:48:21,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:21,242 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:21,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:48:21,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:21,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:21,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1108183710, now seen corresponding path program 1 times [2023-11-29 00:48:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:21,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202296995] [2023-11-29 00:48:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:21,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:21,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251307834] [2023-11-29 00:48:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:21,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:21,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:21,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:48:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:21,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:22,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:22,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:22,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202296995] [2023-11-29 00:48:22,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251307834] [2023-11-29 00:48:22,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251307834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254903073] [2023-11-29 00:48:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:22,072 INFO L87 Difference]: Start difference. First operand 1653 states and 2815 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:22,311 INFO L93 Difference]: Finished difference Result 4617 states and 7897 transitions. [2023-11-29 00:48:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 515 [2023-11-29 00:48:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:22,337 INFO L225 Difference]: With dead ends: 4617 [2023-11-29 00:48:22,338 INFO L226 Difference]: Without dead ends: 3123 [2023-11-29 00:48:22,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:22,344 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 485 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:22,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1248 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2023-11-29 00:48:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2033. [2023-11-29 00:48:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1707 states have (on average 1.657293497363796) internal successors, (2829), 1709 states have internal predecessors, (2829), 319 states have call successors, (319), 6 states have call predecessors, (319), 6 states have return successors, (319), 317 states have call predecessors, (319), 319 states have call successors, (319) [2023-11-29 00:48:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3467 transitions. [2023-11-29 00:48:22,680 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3467 transitions. Word has length 515 [2023-11-29 00:48:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:22,682 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 3467 transitions. [2023-11-29 00:48:22,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3467 transitions. [2023-11-29 00:48:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-11-29 00:48:22,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:22,695 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:22,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:48:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:22,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:22,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1668883488, now seen corresponding path program 1 times [2023-11-29 00:48:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:22,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956691713] [2023-11-29 00:48:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:22,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170566677] [2023-11-29 00:48:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:22,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:22,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:48:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:23,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:23,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:23,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:23,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:23,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956691713] [2023-11-29 00:48:23,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170566677] [2023-11-29 00:48:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170566677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177400995] [2023-11-29 00:48:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:23,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:23,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:23,511 INFO L87 Difference]: Start difference. First operand 2033 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:23,799 INFO L93 Difference]: Finished difference Result 4581 states and 7769 transitions. [2023-11-29 00:48:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 515 [2023-11-29 00:48:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:23,820 INFO L225 Difference]: With dead ends: 4581 [2023-11-29 00:48:23,820 INFO L226 Difference]: Without dead ends: 2707 [2023-11-29 00:48:23,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:23,826 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 431 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:23,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1257 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2023-11-29 00:48:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2033. [2023-11-29 00:48:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1707 states have (on average 1.645577035735208) internal successors, (2809), 1709 states have internal predecessors, (2809), 319 states have call successors, (319), 6 states have call predecessors, (319), 6 states have return successors, (319), 317 states have call predecessors, (319), 319 states have call successors, (319) [2023-11-29 00:48:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3447 transitions. [2023-11-29 00:48:24,029 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3447 transitions. Word has length 515 [2023-11-29 00:48:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:24,030 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 3447 transitions. [2023-11-29 00:48:24,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3447 transitions. [2023-11-29 00:48:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:24,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:24,039 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:24,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:48:24,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:48:24,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:24,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1244907142, now seen corresponding path program 1 times [2023-11-29 00:48:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:24,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261730296] [2023-11-29 00:48:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:24,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:24,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556025617] [2023-11-29 00:48:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:24,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:24,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:48:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:24,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:24,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:24,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:24,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261730296] [2023-11-29 00:48:24,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556025617] [2023-11-29 00:48:24,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556025617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:24,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:24,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249273728] [2023-11-29 00:48:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:24,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:24,944 INFO L87 Difference]: Start difference. First operand 2033 states and 3447 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:25,184 INFO L93 Difference]: Finished difference Result 5753 states and 9781 transitions. [2023-11-29 00:48:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:25,212 INFO L225 Difference]: With dead ends: 5753 [2023-11-29 00:48:25,212 INFO L226 Difference]: Without dead ends: 3879 [2023-11-29 00:48:25,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:25,220 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 439 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:25,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 995 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2023-11-29 00:48:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3873. [2023-11-29 00:48:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3299 states have (on average 1.6408002424977266) internal successors, (5413), 3303 states have internal predecessors, (5413), 563 states have call successors, (563), 10 states have call predecessors, (563), 10 states have return successors, (563), 559 states have call predecessors, (563), 563 states have call successors, (563) [2023-11-29 00:48:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 6539 transitions. [2023-11-29 00:48:25,615 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 6539 transitions. Word has length 516 [2023-11-29 00:48:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:25,617 INFO L495 AbstractCegarLoop]: Abstraction has 3873 states and 6539 transitions. [2023-11-29 00:48:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 6539 transitions. [2023-11-29 00:48:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:25,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:25,626 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:25,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:48:25,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:25,827 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:25,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash -998692986, now seen corresponding path program 1 times [2023-11-29 00:48:25,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:25,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862192983] [2023-11-29 00:48:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:25,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:25,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092259810] [2023-11-29 00:48:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:25,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:48:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:26,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:48:26,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:27,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:27,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:27,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862192983] [2023-11-29 00:48:27,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092259810] [2023-11-29 00:48:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092259810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:27,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:27,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:48:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169319954] [2023-11-29 00:48:27,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:48:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:48:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:27,794 INFO L87 Difference]: Start difference. First operand 3873 states and 6539 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:28,433 INFO L93 Difference]: Finished difference Result 12349 states and 20881 transitions. [2023-11-29 00:48:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:48:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:28,479 INFO L225 Difference]: With dead ends: 12349 [2023-11-29 00:48:28,479 INFO L226 Difference]: Without dead ends: 8613 [2023-11-29 00:48:28,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:48:28,490 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 911 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:28,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 2048 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8613 states. [2023-11-29 00:48:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8613 to 5779. [2023-11-29 00:48:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 4957 states have (on average 1.6382892878757314) internal successors, (8121), 4963 states have internal predecessors, (8121), 807 states have call successors, (807), 14 states have call predecessors, (807), 14 states have return successors, (807), 801 states have call predecessors, (807), 807 states have call successors, (807) [2023-11-29 00:48:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 9735 transitions. [2023-11-29 00:48:28,948 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 9735 transitions. Word has length 516 [2023-11-29 00:48:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 5779 states and 9735 transitions. [2023-11-29 00:48:28,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 9735 transitions. [2023-11-29 00:48:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:28,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:28,962 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:28,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:48:29,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:29,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:29,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 880437960, now seen corresponding path program 1 times [2023-11-29 00:48:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460020688] [2023-11-29 00:48:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:29,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:29,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449063745] [2023-11-29 00:48:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:29,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:29,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:29,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:29,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:48:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:29,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:48:29,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:29,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460020688] [2023-11-29 00:48:29,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449063745] [2023-11-29 00:48:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449063745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:29,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:48:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344823356] [2023-11-29 00:48:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:29,757 INFO L87 Difference]: Start difference. First operand 5779 states and 9735 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:30,455 INFO L93 Difference]: Finished difference Result 16403 states and 27659 transitions. [2023-11-29 00:48:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:48:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:30,497 INFO L225 Difference]: With dead ends: 16403 [2023-11-29 00:48:30,497 INFO L226 Difference]: Without dead ends: 10783 [2023-11-29 00:48:30,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:30,513 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1466 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:30,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 2073 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2023-11-29 00:48:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 6763. [2023-11-29 00:48:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5941 states have (on average 1.6423161083992595) internal successors, (9757), 5947 states have internal predecessors, (9757), 807 states have call successors, (807), 14 states have call predecessors, (807), 14 states have return successors, (807), 801 states have call predecessors, (807), 807 states have call successors, (807) [2023-11-29 00:48:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 11371 transitions. [2023-11-29 00:48:31,210 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 11371 transitions. Word has length 516 [2023-11-29 00:48:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:31,210 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 11371 transitions. [2023-11-29 00:48:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 11371 transitions. [2023-11-29 00:48:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:31,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:31,222 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:31,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:48:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 148470534, now seen corresponding path program 1 times [2023-11-29 00:48:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091035801] [2023-11-29 00:48:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:31,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:31,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541739535] [2023-11-29 00:48:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:31,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:48:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:31,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:31,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:31,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:31,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:31,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091035801] [2023-11-29 00:48:31,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:31,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541739535] [2023-11-29 00:48:31,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541739535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:31,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:31,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:48:31,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820530780] [2023-11-29 00:48:31,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:48:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:48:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:31,946 INFO L87 Difference]: Start difference. First operand 6763 states and 11371 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:33,348 INFO L93 Difference]: Finished difference Result 15626 states and 26125 transitions. [2023-11-29 00:48:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:48:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:33,367 INFO L225 Difference]: With dead ends: 15626 [2023-11-29 00:48:33,367 INFO L226 Difference]: Without dead ends: 8640 [2023-11-29 00:48:33,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:48:33,377 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 2306 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2306 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:33,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2306 Valid, 3514 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:48:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2023-11-29 00:48:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 5680. [2023-11-29 00:48:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 5140 states have (on average 1.6375486381322957) internal successors, (8417), 5140 states have internal predecessors, (8417), 525 states have call successors, (525), 14 states have call predecessors, (525), 14 states have return successors, (525), 525 states have call predecessors, (525), 525 states have call successors, (525) [2023-11-29 00:48:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 9467 transitions. [2023-11-29 00:48:33,701 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 9467 transitions. Word has length 516 [2023-11-29 00:48:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:33,702 INFO L495 AbstractCegarLoop]: Abstraction has 5680 states and 9467 transitions. [2023-11-29 00:48:33,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 9467 transitions. [2023-11-29 00:48:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:33,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:33,711 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:33,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:33,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:33,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2030747018, now seen corresponding path program 1 times [2023-11-29 00:48:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:33,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328586745] [2023-11-29 00:48:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:33,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932132179] [2023-11-29 00:48:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:33,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:33,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:33,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:48:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:34,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:34,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:34,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:34,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328586745] [2023-11-29 00:48:34,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932132179] [2023-11-29 00:48:34,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932132179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:34,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:34,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:34,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262103119] [2023-11-29 00:48:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:34,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:34,506 INFO L87 Difference]: Start difference. First operand 5680 states and 9467 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:34,752 INFO L93 Difference]: Finished difference Result 11008 states and 18358 transitions. [2023-11-29 00:48:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:34,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:34,762 INFO L225 Difference]: With dead ends: 11008 [2023-11-29 00:48:34,762 INFO L226 Difference]: Without dead ends: 5487 [2023-11-29 00:48:34,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:34,770 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 433 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:34,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1239 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2023-11-29 00:48:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 5259. [2023-11-29 00:48:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 4719 states have (on average 1.6225895316804408) internal successors, (7657), 4719 states have internal predecessors, (7657), 525 states have call successors, (525), 14 states have call predecessors, (525), 14 states have return successors, (525), 525 states have call predecessors, (525), 525 states have call successors, (525) [2023-11-29 00:48:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 8707 transitions. [2023-11-29 00:48:35,148 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 8707 transitions. Word has length 516 [2023-11-29 00:48:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:35,149 INFO L495 AbstractCegarLoop]: Abstraction has 5259 states and 8707 transitions. [2023-11-29 00:48:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 8707 transitions. [2023-11-29 00:48:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:35,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:35,160 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:35,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:48:35,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:48:35,361 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:35,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 36602312, now seen corresponding path program 1 times [2023-11-29 00:48:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569412547] [2023-11-29 00:48:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:35,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:35,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719880060] [2023-11-29 00:48:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:35,441 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:35,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:48:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:35,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:35,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:35,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569412547] [2023-11-29 00:48:35,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719880060] [2023-11-29 00:48:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719880060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:35,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:35,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:48:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948489549] [2023-11-29 00:48:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:35,957 INFO L87 Difference]: Start difference. First operand 5259 states and 8707 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:36,729 INFO L93 Difference]: Finished difference Result 11721 states and 19326 transitions. [2023-11-29 00:48:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:36,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:36,741 INFO L225 Difference]: With dead ends: 11721 [2023-11-29 00:48:36,741 INFO L226 Difference]: Without dead ends: 6621 [2023-11-29 00:48:36,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:36,752 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 473 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:36,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1741 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2023-11-29 00:48:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 5209. [2023-11-29 00:48:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 4669 states have (on average 1.6206896551724137) internal successors, (7567), 4669 states have internal predecessors, (7567), 525 states have call successors, (525), 14 states have call predecessors, (525), 14 states have return successors, (525), 525 states have call predecessors, (525), 525 states have call successors, (525) [2023-11-29 00:48:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 8617 transitions. [2023-11-29 00:48:37,158 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 8617 transitions. Word has length 516 [2023-11-29 00:48:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:37,159 INFO L495 AbstractCegarLoop]: Abstraction has 5209 states and 8617 transitions. [2023-11-29 00:48:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 8617 transitions. [2023-11-29 00:48:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-29 00:48:37,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:37,170 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:37,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:37,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:37,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash 990542470, now seen corresponding path program 1 times [2023-11-29 00:48:37,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:37,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823468803] [2023-11-29 00:48:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:37,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:37,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109017365] [2023-11-29 00:48:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:37,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:37,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:48:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:37,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:48:37,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:39,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823468803] [2023-11-29 00:48:39,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109017365] [2023-11-29 00:48:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109017365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:39,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:39,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:39,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249767280] [2023-11-29 00:48:39,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:39,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:39,380 INFO L87 Difference]: Start difference. First operand 5209 states and 8617 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:39,950 INFO L93 Difference]: Finished difference Result 13255 states and 21896 transitions. [2023-11-29 00:48:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 516 [2023-11-29 00:48:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:39,962 INFO L225 Difference]: With dead ends: 13255 [2023-11-29 00:48:39,963 INFO L226 Difference]: Without dead ends: 8205 [2023-11-29 00:48:39,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:39,970 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 448 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1463 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8205 states. [2023-11-29 00:48:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8205 to 7635. [2023-11-29 00:48:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7095 states have (on average 1.6307258632840027) internal successors, (11570), 7095 states have internal predecessors, (11570), 525 states have call successors, (525), 14 states have call predecessors, (525), 14 states have return successors, (525), 525 states have call predecessors, (525), 525 states have call successors, (525) [2023-11-29 00:48:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 12620 transitions. [2023-11-29 00:48:40,365 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 12620 transitions. Word has length 516 [2023-11-29 00:48:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:40,366 INFO L495 AbstractCegarLoop]: Abstraction has 7635 states and 12620 transitions. [2023-11-29 00:48:40,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 12620 transitions. [2023-11-29 00:48:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2023-11-29 00:48:40,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:40,376 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:40,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:40,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:40,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:40,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 854115445, now seen corresponding path program 1 times [2023-11-29 00:48:40,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554398229] [2023-11-29 00:48:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:40,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436608058] [2023-11-29 00:48:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:40,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:40,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:40,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:48:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:41,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:48:41,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:42,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554398229] [2023-11-29 00:48:42,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436608058] [2023-11-29 00:48:42,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436608058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:42,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:42,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203335331] [2023-11-29 00:48:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:42,147 INFO L87 Difference]: Start difference. First operand 7635 states and 12620 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:42,649 INFO L93 Difference]: Finished difference Result 15549 states and 25684 transitions. [2023-11-29 00:48:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:42,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 517 [2023-11-29 00:48:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:42,660 INFO L225 Difference]: With dead ends: 15549 [2023-11-29 00:48:42,661 INFO L226 Difference]: Without dead ends: 8205 [2023-11-29 00:48:42,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:42,670 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 444 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:42,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1466 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8205 states. [2023-11-29 00:48:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8205 to 7642. [2023-11-29 00:48:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7642 states, 7102 states have (on average 1.628414531117995) internal successors, (11565), 7102 states have internal predecessors, (11565), 525 states have call successors, (525), 14 states have call predecessors, (525), 14 states have return successors, (525), 525 states have call predecessors, (525), 525 states have call successors, (525) [2023-11-29 00:48:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7642 states to 7642 states and 12615 transitions. [2023-11-29 00:48:43,011 INFO L78 Accepts]: Start accepts. Automaton has 7642 states and 12615 transitions. Word has length 517 [2023-11-29 00:48:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:43,012 INFO L495 AbstractCegarLoop]: Abstraction has 7642 states and 12615 transitions. [2023-11-29 00:48:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7642 states and 12615 transitions. [2023-11-29 00:48:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2023-11-29 00:48:43,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:43,021 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:43,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:48:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:43,222 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:43,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:43,222 INFO L85 PathProgramCache]: Analyzing trace with hash -203722633, now seen corresponding path program 1 times [2023-11-29 00:48:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:43,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889010530] [2023-11-29 00:48:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:43,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:43,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156659650] [2023-11-29 00:48:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:43,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:43,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:48:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:43,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:48:43,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 6548 proven. 297 refuted. 0 times theorem prover too weak. 4255 trivial. 0 not checked. [2023-11-29 00:48:45,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-29 00:48:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889010530] [2023-11-29 00:48:46,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156659650] [2023-11-29 00:48:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156659650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:46,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:46,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-29 00:48:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006396200] [2023-11-29 00:48:46,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:48:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:48:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:48:46,357 INFO L87 Difference]: Start difference. First operand 7642 states and 12615 transitions. Second operand has 20 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (142), 5 states have call predecessors, (142), 5 states have call successors, (142) [2023-11-29 00:48:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:54,485 INFO L93 Difference]: Finished difference Result 40076 states and 65914 transitions. [2023-11-29 00:48:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 00:48:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (142), 5 states have call predecessors, (142), 5 states have call successors, (142) Word has length 517 [2023-11-29 00:48:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:54,529 INFO L225 Difference]: With dead ends: 40076 [2023-11-29 00:48:54,530 INFO L226 Difference]: Without dead ends: 33932 [2023-11-29 00:48:54,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 00:48:54,545 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 4882 mSDsluCounter, 6219 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 1607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4893 SdHoareTripleChecker+Valid, 7210 SdHoareTripleChecker+Invalid, 6526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1607 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:54,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4893 Valid, 7210 Invalid, 6526 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1607 Valid, 4919 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 00:48:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33932 states. [2023-11-29 00:48:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33932 to 20780. [2023-11-29 00:48:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20780 states, 19506 states have (on average 1.6287808879319183) internal successors, (31771), 19512 states have internal predecessors, (31771), 1209 states have call successors, (1209), 64 states have call predecessors, (1209), 64 states have return successors, (1209), 1203 states have call predecessors, (1209), 1209 states have call successors, (1209) [2023-11-29 00:48:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20780 states to 20780 states and 34189 transitions. [2023-11-29 00:48:55,751 INFO L78 Accepts]: Start accepts. Automaton has 20780 states and 34189 transitions. Word has length 517 [2023-11-29 00:48:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:55,753 INFO L495 AbstractCegarLoop]: Abstraction has 20780 states and 34189 transitions. [2023-11-29 00:48:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (142), 5 states have call predecessors, (142), 5 states have call successors, (142) [2023-11-29 00:48:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20780 states and 34189 transitions. [2023-11-29 00:48:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2023-11-29 00:48:55,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:55,764 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:55,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:55,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:55,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:55,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -647623307, now seen corresponding path program 1 times [2023-11-29 00:48:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764440120] [2023-11-29 00:48:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:56,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:56,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606761193] [2023-11-29 00:48:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:56,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:56,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:56,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:48:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:56,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:48:56,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:48:57,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:57,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:57,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764440120] [2023-11-29 00:48:57,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:57,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606761193] [2023-11-29 00:48:57,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606761193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:57,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:57,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:57,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839951577] [2023-11-29 00:48:57,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:57,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:57,992 INFO L87 Difference]: Start difference. First operand 20780 states and 34189 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:48:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:59,200 INFO L93 Difference]: Finished difference Result 39583 states and 65049 transitions. [2023-11-29 00:48:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 517 [2023-11-29 00:48:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:59,229 INFO L225 Difference]: With dead ends: 39583 [2023-11-29 00:48:59,229 INFO L226 Difference]: Without dead ends: 23216 [2023-11-29 00:48:59,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:48:59,246 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 461 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:59,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1652 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23216 states. [2023-11-29 00:49:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23216 to 23062. [2023-11-29 00:49:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23062 states, 21788 states have (on average 1.625619607123187) internal successors, (35419), 21794 states have internal predecessors, (35419), 1209 states have call successors, (1209), 64 states have call predecessors, (1209), 64 states have return successors, (1209), 1203 states have call predecessors, (1209), 1209 states have call successors, (1209) [2023-11-29 00:49:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23062 states to 23062 states and 37837 transitions. [2023-11-29 00:49:00,181 INFO L78 Accepts]: Start accepts. Automaton has 23062 states and 37837 transitions. Word has length 517 [2023-11-29 00:49:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:00,182 INFO L495 AbstractCegarLoop]: Abstraction has 23062 states and 37837 transitions. [2023-11-29 00:49:00,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23062 states and 37837 transitions. [2023-11-29 00:49:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 00:49:00,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:00,197 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:00,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:49:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:00,397 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:00,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -146645184, now seen corresponding path program 1 times [2023-11-29 00:49:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800828178] [2023-11-29 00:49:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:00,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:00,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150887141] [2023-11-29 00:49:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:00,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:00,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:00,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:49:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:01,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:49:01,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:49:02,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800828178] [2023-11-29 00:49:02,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150887141] [2023-11-29 00:49:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150887141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:02,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:49:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836539220] [2023-11-29 00:49:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:49:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:49:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:49:02,491 INFO L87 Difference]: Start difference. First operand 23062 states and 37837 transitions. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 7 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:04,128 INFO L93 Difference]: Finished difference Result 47588 states and 77345 transitions. [2023-11-29 00:49:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:49:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 7 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 518 [2023-11-29 00:49:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:04,161 INFO L225 Difference]: With dead ends: 47588 [2023-11-29 00:49:04,161 INFO L226 Difference]: Without dead ends: 30275 [2023-11-29 00:49:04,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:49:04,179 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 993 mSDsluCounter, 3272 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 3883 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:04,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 3883 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:49:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30275 states. [2023-11-29 00:49:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30275 to 26235. [2023-11-29 00:49:05,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26235 states, 24961 states have (on average 1.6185248988421939) internal successors, (40400), 24967 states have internal predecessors, (40400), 1209 states have call successors, (1209), 64 states have call predecessors, (1209), 64 states have return successors, (1209), 1203 states have call predecessors, (1209), 1209 states have call successors, (1209) [2023-11-29 00:49:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26235 states to 26235 states and 42818 transitions. [2023-11-29 00:49:05,467 INFO L78 Accepts]: Start accepts. Automaton has 26235 states and 42818 transitions. Word has length 518 [2023-11-29 00:49:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:05,468 INFO L495 AbstractCegarLoop]: Abstraction has 26235 states and 42818 transitions. [2023-11-29 00:49:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 7 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26235 states and 42818 transitions. [2023-11-29 00:49:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 00:49:05,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:05,487 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:05,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:49:05,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:05,688 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:05,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1601787999, now seen corresponding path program 1 times [2023-11-29 00:49:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285851320] [2023-11-29 00:49:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:05,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247889630] [2023-11-29 00:49:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:05,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:05,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:05,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:05,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:49:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:06,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:49:06,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:49:06,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285851320] [2023-11-29 00:49:06,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:06,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247889630] [2023-11-29 00:49:06,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247889630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:06,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:49:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98548349] [2023-11-29 00:49:06,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:06,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:49:06,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:06,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:49:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:49:06,752 INFO L87 Difference]: Start difference. First operand 26235 states and 42818 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:08,974 INFO L93 Difference]: Finished difference Result 61044 states and 98981 transitions. [2023-11-29 00:49:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:49:08,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 518 [2023-11-29 00:49:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:09,021 INFO L225 Difference]: With dead ends: 61044 [2023-11-29 00:49:09,021 INFO L226 Difference]: Without dead ends: 43945 [2023-11-29 00:49:09,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:49:09,034 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 1269 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:09,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 2414 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:49:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43945 states. [2023-11-29 00:49:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43945 to 28101. [2023-11-29 00:49:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28101 states, 26827 states have (on average 1.616803966153502) internal successors, (43374), 26833 states have internal predecessors, (43374), 1209 states have call successors, (1209), 64 states have call predecessors, (1209), 64 states have return successors, (1209), 1203 states have call predecessors, (1209), 1209 states have call successors, (1209) [2023-11-29 00:49:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28101 states to 28101 states and 45792 transitions. [2023-11-29 00:49:10,408 INFO L78 Accepts]: Start accepts. Automaton has 28101 states and 45792 transitions. Word has length 518 [2023-11-29 00:49:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 28101 states and 45792 transitions. [2023-11-29 00:49:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28101 states and 45792 transitions. [2023-11-29 00:49:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 00:49:10,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:10,424 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:10,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:49:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:49:10,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1735801505, now seen corresponding path program 1 times [2023-11-29 00:49:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18759473] [2023-11-29 00:49:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:10,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729570024] [2023-11-29 00:49:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:10,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:10,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:49:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:11,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:49:11,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:49:11,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18759473] [2023-11-29 00:49:11,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729570024] [2023-11-29 00:49:11,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729570024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:11,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:11,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:49:11,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082271748] [2023-11-29 00:49:11,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:11,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:49:11,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:49:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:49:11,201 INFO L87 Difference]: Start difference. First operand 28101 states and 45792 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:14,639 INFO L93 Difference]: Finished difference Result 114367 states and 185794 transitions. [2023-11-29 00:49:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:49:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 518 [2023-11-29 00:49:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:14,749 INFO L225 Difference]: With dead ends: 114367 [2023-11-29 00:49:14,749 INFO L226 Difference]: Without dead ends: 86317 [2023-11-29 00:49:14,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:49:14,776 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 1300 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:14,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 2183 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:49:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86317 states. [2023-11-29 00:49:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86317 to 55555. [2023-11-29 00:49:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55555 states, 53267 states have (on average 1.6179060206131375) internal successors, (86181), 53291 states have internal predecessors, (86181), 2163 states have call successors, (2163), 124 states have call predecessors, (2163), 124 states have return successors, (2163), 2139 states have call predecessors, (2163), 2163 states have call successors, (2163) [2023-11-29 00:49:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55555 states to 55555 states and 90507 transitions. [2023-11-29 00:49:16,987 INFO L78 Accepts]: Start accepts. Automaton has 55555 states and 90507 transitions. Word has length 518 [2023-11-29 00:49:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:16,987 INFO L495 AbstractCegarLoop]: Abstraction has 55555 states and 90507 transitions. [2023-11-29 00:49:16,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 55555 states and 90507 transitions. [2023-11-29 00:49:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 00:49:17,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:17,012 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:17,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:49:17,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:17,213 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:17,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1495561759, now seen corresponding path program 1 times [2023-11-29 00:49:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:17,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446518678] [2023-11-29 00:49:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:17,285 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:17,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110296421] [2023-11-29 00:49:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:17,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:17,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:17,286 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:17,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:49:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:17,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:49:17,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:49:18,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:18,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446518678] [2023-11-29 00:49:18,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110296421] [2023-11-29 00:49:18,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110296421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:18,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:18,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:49:18,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809125896] [2023-11-29 00:49:18,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:18,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:49:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:49:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:49:18,295 INFO L87 Difference]: Start difference. First operand 55555 states and 90507 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:22,457 INFO L93 Difference]: Finished difference Result 161849 states and 263647 transitions. [2023-11-29 00:49:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:49:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 518 [2023-11-29 00:49:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:22,649 INFO L225 Difference]: With dead ends: 161849 [2023-11-29 00:49:22,649 INFO L226 Difference]: Without dead ends: 106987 [2023-11-29 00:49:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:49:22,675 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 2719 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2719 Valid, 3710 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:49:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106987 states. [2023-11-29 00:49:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106987 to 84050. [2023-11-29 00:49:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84050 states, 80222 states have (on average 1.61551694049014) internal successors, (129600), 80258 states have internal predecessors, (129600), 3615 states have call successors, (3615), 212 states have call predecessors, (3615), 212 states have return successors, (3615), 3579 states have call predecessors, (3615), 3615 states have call successors, (3615) [2023-11-29 00:49:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84050 states to 84050 states and 136830 transitions. [2023-11-29 00:49:26,528 INFO L78 Accepts]: Start accepts. Automaton has 84050 states and 136830 transitions. Word has length 518 [2023-11-29 00:49:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:26,529 INFO L495 AbstractCegarLoop]: Abstraction has 84050 states and 136830 transitions. [2023-11-29 00:49:26,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 84050 states and 136830 transitions. [2023-11-29 00:49:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-29 00:49:26,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:26,575 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:26,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:49:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:26,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:26,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1929864969, now seen corresponding path program 1 times [2023-11-29 00:49:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:26,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030903363] [2023-11-29 00:49:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:26,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146548951] [2023-11-29 00:49:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:26,839 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:26,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:49:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:27,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:49:27,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 3368 proven. 39 refuted. 0 times theorem prover too weak. 7693 trivial. 0 not checked. [2023-11-29 00:49:27,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 183 proven. 39 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-29 00:49:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:27,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030903363] [2023-11-29 00:49:27,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146548951] [2023-11-29 00:49:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146548951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:27,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:49:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:49:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84158499] [2023-11-29 00:49:27,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:49:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:49:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:49:27,615 INFO L87 Difference]: Start difference. First operand 84050 states and 136830 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-11-29 00:49:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:29,974 INFO L93 Difference]: Finished difference Result 120379 states and 196194 transitions. [2023-11-29 00:49:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:49:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 518 [2023-11-29 00:49:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:30,050 INFO L225 Difference]: With dead ends: 120379 [2023-11-29 00:49:30,050 INFO L226 Difference]: Without dead ends: 51192 [2023-11-29 00:49:30,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 1028 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:49:30,088 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 713 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:30,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 1104 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:49:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51192 states. [2023-11-29 00:49:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51192 to 50960. [2023-11-29 00:49:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50960 states, 48289 states have (on average 1.609559112841434) internal successors, (77724), 48317 states have internal predecessors, (77724), 2511 states have call successors, (2511), 159 states have call predecessors, (2511), 159 states have return successors, (2511), 2483 states have call predecessors, (2511), 2511 states have call successors, (2511) [2023-11-29 00:49:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50960 states to 50960 states and 82746 transitions. [2023-11-29 00:49:32,590 INFO L78 Accepts]: Start accepts. Automaton has 50960 states and 82746 transitions. Word has length 518 [2023-11-29 00:49:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:32,591 INFO L495 AbstractCegarLoop]: Abstraction has 50960 states and 82746 transitions. [2023-11-29 00:49:32,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-11-29 00:49:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50960 states and 82746 transitions. [2023-11-29 00:49:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2023-11-29 00:49:32,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:32,610 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:32,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:49:32,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:49:32,811 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:32,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1874177808, now seen corresponding path program 1 times [2023-11-29 00:49:32,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:32,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338638541] [2023-11-29 00:49:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:32,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:32,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708155292] [2023-11-29 00:49:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:32,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:32,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:49:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:33,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:49:33,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:49:34,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:34,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338638541] [2023-11-29 00:49:34,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708155292] [2023-11-29 00:49:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708155292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:34,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:34,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:49:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122190147] [2023-11-29 00:49:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:49:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:49:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:49:34,169 INFO L87 Difference]: Start difference. First operand 50960 states and 82746 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:42,248 INFO L93 Difference]: Finished difference Result 144820 states and 235237 transitions. [2023-11-29 00:49:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:49:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 519 [2023-11-29 00:49:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:42,401 INFO L225 Difference]: With dead ends: 144820 [2023-11-29 00:49:42,401 INFO L226 Difference]: Without dead ends: 102585 [2023-11-29 00:49:42,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:49:42,429 INFO L413 NwaCegarLoop]: 1135 mSDtfsCounter, 3395 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 5840 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:42,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3395 Valid, 5840 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:49:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102585 states. [2023-11-29 00:49:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102585 to 61912. [2023-11-29 00:49:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61912 states, 57560 states have (on average 1.6022411396803335) internal successors, (92225), 57605 states have internal predecessors, (92225), 4092 states have call successors, (4092), 259 states have call predecessors, (4092), 259 states have return successors, (4092), 4047 states have call predecessors, (4092), 4092 states have call successors, (4092) [2023-11-29 00:49:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61912 states to 61912 states and 100409 transitions. [2023-11-29 00:49:46,414 INFO L78 Accepts]: Start accepts. Automaton has 61912 states and 100409 transitions. Word has length 519 [2023-11-29 00:49:46,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:46,415 INFO L495 AbstractCegarLoop]: Abstraction has 61912 states and 100409 transitions. [2023-11-29 00:49:46,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:49:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 61912 states and 100409 transitions. [2023-11-29 00:49:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2023-11-29 00:49:46,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:46,431 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:46,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:49:46,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:46,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:46,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1551248920, now seen corresponding path program 1 times [2023-11-29 00:49:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:46,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685689827] [2023-11-29 00:49:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:46,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734520208] [2023-11-29 00:49:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:46,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:46,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:49:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:47,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:49:47,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 2972 proven. 33 refuted. 0 times theorem prover too weak. 8095 trivial. 0 not checked. [2023-11-29 00:49:47,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 189 proven. 33 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-29 00:49:48,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685689827] [2023-11-29 00:49:48,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734520208] [2023-11-29 00:49:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734520208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:48,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:49:48,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-11-29 00:49:48,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459280135] [2023-11-29 00:49:48,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:49:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:49:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:49:48,089 INFO L87 Difference]: Start difference. First operand 61912 states and 100409 transitions. Second operand has 15 states, 15 states have (on average 14.066666666666666) internal successors, (211), 15 states have internal predecessors, (211), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) [2023-11-29 00:50:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:03,885 INFO L93 Difference]: Finished difference Result 159681 states and 256803 transitions. [2023-11-29 00:50:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:50:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.066666666666666) internal successors, (211), 15 states have internal predecessors, (211), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) Word has length 519 [2023-11-29 00:50:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:04,129 INFO L225 Difference]: With dead ends: 159681 [2023-11-29 00:50:04,129 INFO L226 Difference]: Without dead ends: 105368 [2023-11-29 00:50:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 1030 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=814, Invalid=2266, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:50:04,166 INFO L413 NwaCegarLoop]: 1282 mSDtfsCounter, 8768 mSDsluCounter, 8799 mSDsCounter, 0 mSdLazyCounter, 3857 mSolverCounterSat, 2319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8888 SdHoareTripleChecker+Valid, 10081 SdHoareTripleChecker+Invalid, 6176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2319 IncrementalHoareTripleChecker+Valid, 3857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8888 Valid, 10081 Invalid, 6176 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2319 Valid, 3857 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 00:50:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105368 states. [2023-11-29 00:50:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105368 to 56802. [2023-11-29 00:50:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56802 states, 49992 states have (on average 1.5628100496079373) internal successors, (78128), 50069 states have internal predecessors, (78128), 6358 states have call successors, (6358), 451 states have call predecessors, (6358), 451 states have return successors, (6358), 6281 states have call predecessors, (6358), 6358 states have call successors, (6358) [2023-11-29 00:50:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56802 states to 56802 states and 90844 transitions. [2023-11-29 00:50:09,646 INFO L78 Accepts]: Start accepts. Automaton has 56802 states and 90844 transitions. Word has length 519 [2023-11-29 00:50:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:09,646 INFO L495 AbstractCegarLoop]: Abstraction has 56802 states and 90844 transitions. [2023-11-29 00:50:09,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.066666666666666) internal successors, (211), 15 states have internal predecessors, (211), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) [2023-11-29 00:50:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56802 states and 90844 transitions. [2023-11-29 00:50:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2023-11-29 00:50:09,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:09,656 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:09,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:50:09,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:50:09,857 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:09,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:09,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1936616853, now seen corresponding path program 1 times [2023-11-29 00:50:09,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:09,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765780378] [2023-11-29 00:50:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:09,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984533371] [2023-11-29 00:50:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:09,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:09,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:09,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:50:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:10,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:50:10,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-29 00:50:10,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:50:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765780378] [2023-11-29 00:50:10,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984533371] [2023-11-29 00:50:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984533371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:50:10,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:50:10,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:50:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206513538] [2023-11-29 00:50:10,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:50:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:50:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:50:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:50:10,856 INFO L87 Difference]: Start difference. First operand 56802 states and 90844 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:50:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:25,850 INFO L93 Difference]: Finished difference Result 217932 states and 348943 transitions. [2023-11-29 00:50:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:50:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 519 [2023-11-29 00:50:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:26,087 INFO L225 Difference]: With dead ends: 217932 [2023-11-29 00:50:26,087 INFO L226 Difference]: Without dead ends: 168421 [2023-11-29 00:50:26,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:50:26,136 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 1303 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:26,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 2200 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:50:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168421 states. [2023-11-29 00:50:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168421 to 168303. [2023-11-29 00:50:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168303 states, 147772 states have (on average 1.562494924613594) internal successors, (230893), 147960 states have internal predecessors, (230893), 19067 states have call successors, (19067), 1463 states have call predecessors, (19067), 1463 states have return successors, (19067), 18879 states have call predecessors, (19067), 19067 states have call successors, (19067) [2023-11-29 00:50:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168303 states to 168303 states and 269027 transitions. [2023-11-29 00:50:42,874 INFO L78 Accepts]: Start accepts. Automaton has 168303 states and 269027 transitions. Word has length 519 [2023-11-29 00:50:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:42,874 INFO L495 AbstractCegarLoop]: Abstraction has 168303 states and 269027 transitions. [2023-11-29 00:50:42,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-29 00:50:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 168303 states and 269027 transitions. [2023-11-29 00:50:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2023-11-29 00:50:42,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:42,889 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:42,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:50:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:50:43,090 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:43,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash -307366445, now seen corresponding path program 1 times [2023-11-29 00:50:43,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:43,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158957085] [2023-11-29 00:50:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:43,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:43,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339669564] [2023-11-29 00:50:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:43,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:43,145 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:43,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:50:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:43,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:50:43,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5819 proven. 720 refuted. 0 times theorem prover too weak. 4561 trivial. 0 not checked. [2023-11-29 00:50:48,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:56,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158957085] [2023-11-29 00:50:56,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339669564] [2023-11-29 00:50:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339669564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:56,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:50:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 00:50:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807127498] [2023-11-29 00:50:56,055 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:50:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:50:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:50:56,057 INFO L87 Difference]: Start difference. First operand 168303 states and 269027 transitions. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 20 states have internal predecessors, (168), 6 states have call successors, (75), 6 states have call predecessors, (75), 8 states have return successors, (75), 6 states have call predecessors, (75), 6 states have call successors, (75) [2023-11-29 00:51:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:12,478 INFO L93 Difference]: Finished difference Result 272107 states and 435037 transitions. [2023-11-29 00:51:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:51:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 20 states have internal predecessors, (168), 6 states have call successors, (75), 6 states have call predecessors, (75), 8 states have return successors, (75), 6 states have call predecessors, (75), 6 states have call successors, (75) Word has length 519 [2023-11-29 00:51:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:12,735 INFO L225 Difference]: With dead ends: 272107 [2023-11-29 00:51:12,735 INFO L226 Difference]: Without dead ends: 178489 [2023-11-29 00:51:12,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=648, Invalid=2322, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 00:51:12,817 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 2193 mSDsluCounter, 4195 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2193 SdHoareTripleChecker+Valid, 4668 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:12,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2193 Valid, 4668 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:51:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178489 states. [2023-11-29 00:51:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178489 to 168675. [2023-11-29 00:51:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168675 states, 148138 states have (on average 1.5627252966828227) internal successors, (231499), 148326 states have internal predecessors, (231499), 19067 states have call successors, (19067), 1469 states have call predecessors, (19067), 1469 states have return successors, (19067), 18879 states have call predecessors, (19067), 19067 states have call successors, (19067) [2023-11-29 00:51:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168675 states to 168675 states and 269633 transitions. [2023-11-29 00:51:28,638 INFO L78 Accepts]: Start accepts. Automaton has 168675 states and 269633 transitions. Word has length 519 [2023-11-29 00:51:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:28,638 INFO L495 AbstractCegarLoop]: Abstraction has 168675 states and 269633 transitions. [2023-11-29 00:51:28,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 20 states have internal predecessors, (168), 6 states have call successors, (75), 6 states have call predecessors, (75), 8 states have return successors, (75), 6 states have call predecessors, (75), 6 states have call successors, (75) [2023-11-29 00:51:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 168675 states and 269633 transitions. [2023-11-29 00:51:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2023-11-29 00:51:28,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:28,652 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:28,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:51:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:51:28,853 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:28,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2017682833, now seen corresponding path program 1 times [2023-11-29 00:51:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400896101] [2023-11-29 00:51:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:28,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:51:28,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433580437] [2023-11-29 00:51:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:28,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:28,909 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:28,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8682e6ed-2307-4cae-844c-0d190494b5fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:51:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:44,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 00:51:44,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 7066 proven. 1710 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2023-11-29 00:52:02,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:42,510 WARN L293 SmtUtils]: Spent 22.06s on a formula simplification. DAG size of input: 322 DAG size of output: 320 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:59:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400896101] [2023-11-29 00:59:42,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:59:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433580437] [2023-11-29 00:59:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433580437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:42,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:59:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2023-11-29 00:59:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981011922] [2023-11-29 00:59:42,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:42,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 00:59:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 00:59:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=2776, Unknown=84, NotChecked=0, Total=3660 [2023-11-29 00:59:42,521 INFO L87 Difference]: Start difference. First operand 168675 states and 269633 transitions. Second operand has 47 states, 47 states have (on average 4.404255319148936) internal successors, (207), 42 states have internal predecessors, (207), 14 states have call successors, (75), 14 states have call predecessors, (75), 21 states have return successors, (75), 14 states have call predecessors, (75), 14 states have call successors, (75)