./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu --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 517e27336460af7ba2854a8d7aa1a1bf348bd2f4daf99eaa687977dfb875eed5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:45,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:45,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:45,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:45,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:45,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:45,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:45,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:45,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:45,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:45,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:45,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:45,447 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:45,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:45,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:45,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:45,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:45,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:45,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:45,452 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:45,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:45,453 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:45,454 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:45,455 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:45,455 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:45,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:45,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:45,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:45,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:45,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:45,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:45,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:45,461 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:45,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:45,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:45,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:45,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:45,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:45,465 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:45,465 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_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 517e27336460af7ba2854a8d7aa1a1bf348bd2f4daf99eaa687977dfb875eed5 [2023-11-19 07:59:45,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:45,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:45,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:45,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:45,881 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:45,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i [2023-11-19 07:59:49,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:49,522 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:49,525 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i [2023-11-19 07:59:49,542 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/data/3141322b3/cbaa7f2c9f884a2eb57606bb294bfc31/FLAGbcda15fa7 [2023-11-19 07:59:49,557 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/data/3141322b3/cbaa7f2c9f884a2eb57606bb294bfc31 [2023-11-19 07:59:49,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:49,573 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:49,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:49,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:49,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:49,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef9e06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49, skipping insertion in model container [2023-11-19 07:59:49,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,639 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:49,812 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_439b7f4a-2610-405a-a4c0-8d0b88d63e83/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i[915,928] [2023-11-19 07:59:49,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:49,901 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:49,913 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_439b7f4a-2610-405a-a4c0-8d0b88d63e83/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-8.i[915,928] [2023-11-19 07:59:49,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:50,006 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:50,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50 WrapperNode [2023-11-19 07:59:50,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:50,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:50,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:50,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:50,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,095 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2023-11-19 07:59:50,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:50,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:50,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:50,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:50,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,137 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:50,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:50,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:50,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:50,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (1/1) ... [2023-11-19 07:59:50,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:50,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:50,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:59:50,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:59:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:50,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:50,452 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:50,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:51,034 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:51,045 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:51,045 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:59:51,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:51 BoogieIcfgContainer [2023-11-19 07:59:51,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:51,053 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:51,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:51,057 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:51,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:49" (1/3) ... [2023-11-19 07:59:51,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1945a85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:51, skipping insertion in model container [2023-11-19 07:59:51,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:50" (2/3) ... [2023-11-19 07:59:51,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1945a85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:51, skipping insertion in model container [2023-11-19 07:59:51,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:51" (3/3) ... [2023-11-19 07:59:51,061 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-8.i [2023-11-19 07:59:51,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:51,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:51,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:51,146 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;@4855efcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>] [2023-11-19 07:59:51,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:59:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 72 states have internal predecessors, (105), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 07:59:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-19 07:59:51,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:51,176 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:51,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:51,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1100111599, now seen corresponding path program 1 times [2023-11-19 07:59:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430253740] [2023-11-19 07:59:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:51,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430253740] [2023-11-19 07:59:51,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:59:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682443574] [2023-11-19 07:59:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:51,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:51,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:51,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:51,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:59:51,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-11-19 07:59:52,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682443574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801272034] [2023-11-19 07:59:52,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:52,156 INFO L87 Difference]: Start difference. First operand has 104 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 72 states have internal predecessors, (105), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-19 07:59:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:52,196 INFO L93 Difference]: Finished difference Result 201 states and 354 transitions. [2023-11-19 07:59:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) Word has length 198 [2023-11-19 07:59:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:52,209 INFO L225 Difference]: With dead ends: 201 [2023-11-19 07:59:52,209 INFO L226 Difference]: Without dead ends: 100 [2023-11-19 07:59:52,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:52,218 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:52,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:52,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-19 07:59:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-19 07:59:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 68 states have internal predecessors, (98), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 07:59:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2023-11-19 07:59:52,281 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 198 [2023-11-19 07:59:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:52,282 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2023-11-19 07:59:52,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-19 07:59:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2023-11-19 07:59:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-19 07:59:52,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:52,290 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:52,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:59:52,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:59:52,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:52,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -350619405, now seen corresponding path program 1 times [2023-11-19 07:59:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:52,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988611527] [2023-11-19 07:59:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:52,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:52,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:52,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886494583] [2023-11-19 07:59:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:52,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:52,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:52,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:52,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-19 07:59:52,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:52,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988611527] [2023-11-19 07:59:52,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:52,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886494583] [2023-11-19 07:59:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886494583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:52,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827248978] [2023-11-19 07:59:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:52,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:52,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:52,965 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:53,098 INFO L93 Difference]: Finished difference Result 294 states and 468 transitions. [2023-11-19 07:59:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 198 [2023-11-19 07:59:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:53,110 INFO L225 Difference]: With dead ends: 294 [2023-11-19 07:59:53,110 INFO L226 Difference]: Without dead ends: 197 [2023-11-19 07:59:53,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:53,116 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 148 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:53,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 437 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-19 07:59:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2023-11-19 07:59:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 79 states have internal predecessors, (115), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 07:59:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 175 transitions. [2023-11-19 07:59:53,158 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 175 transitions. Word has length 198 [2023-11-19 07:59:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:53,160 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 175 transitions. [2023-11-19 07:59:53,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 175 transitions. [2023-11-19 07:59:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-19 07:59:53,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:53,165 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:53,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:53,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:59:53,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:53,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:53,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1361736655, now seen corresponding path program 1 times [2023-11-19 07:59:53,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:53,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809687209] [2023-11-19 07:59:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:53,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:53,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502334629] [2023-11-19 07:59:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:53,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:53,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:53,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:53,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-19 07:59:53,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809687209] [2023-11-19 07:59:53,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502334629] [2023-11-19 07:59:53,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502334629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:53,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556282251] [2023-11-19 07:59:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:53,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:53,683 INFO L87 Difference]: Start difference. First operand 111 states and 175 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:53,735 INFO L93 Difference]: Finished difference Result 292 states and 466 transitions. [2023-11-19 07:59:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 198 [2023-11-19 07:59:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:53,739 INFO L225 Difference]: With dead ends: 292 [2023-11-19 07:59:53,739 INFO L226 Difference]: Without dead ends: 184 [2023-11-19 07:59:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:53,742 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 148 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:53,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 385 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-19 07:59:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 100. [2023-11-19 07:59:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 07:59:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 156 transitions. [2023-11-19 07:59:53,762 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 156 transitions. Word has length 198 [2023-11-19 07:59:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:53,763 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 156 transitions. [2023-11-19 07:59:53,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 156 transitions. [2023-11-19 07:59:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 07:59:53,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:53,767 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:53,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:53,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:53,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash -332092360, now seen corresponding path program 1 times [2023-11-19 07:59:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:53,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353874662] [2023-11-19 07:59:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:54,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858489977] [2023-11-19 07:59:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:54,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:54,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:54,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:54,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:59:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:54,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:59:54,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-19 07:59:54,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:54,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353874662] [2023-11-19 07:59:54,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858489977] [2023-11-19 07:59:54,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858489977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:54,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862865258] [2023-11-19 07:59:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:54,563 INFO L87 Difference]: Start difference. First operand 100 states and 156 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:54,621 INFO L93 Difference]: Finished difference Result 294 states and 462 transitions. [2023-11-19 07:59:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 199 [2023-11-19 07:59:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:54,625 INFO L225 Difference]: With dead ends: 294 [2023-11-19 07:59:54,625 INFO L226 Difference]: Without dead ends: 197 [2023-11-19 07:59:54,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:54,627 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 50 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:54,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 282 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-19 07:59:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2023-11-19 07:59:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 131 states have (on average 1.4045801526717556) internal successors, (184), 131 states have internal predecessors, (184), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:59:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 304 transitions. [2023-11-19 07:59:54,668 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 304 transitions. Word has length 199 [2023-11-19 07:59:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:54,669 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 304 transitions. [2023-11-19 07:59:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 304 transitions. [2023-11-19 07:59:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:59:54,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:54,673 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:54,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:54,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:54,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -740321490, now seen corresponding path program 1 times [2023-11-19 07:59:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:54,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938507683] [2023-11-19 07:59:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:54,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:54,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556828795] [2023-11-19 07:59:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:54,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:54,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:59:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:55,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:59:55,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-19 07:59:55,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:55,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938507683] [2023-11-19 07:59:55,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:59:55,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556828795] [2023-11-19 07:59:55,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556828795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:55,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:55,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:55,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13037134] [2023-11-19 07:59:55,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:55,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:55,449 INFO L87 Difference]: Start difference. First operand 194 states and 304 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:55,646 INFO L93 Difference]: Finished difference Result 485 states and 759 transitions. [2023-11-19 07:59:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:59:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 200 [2023-11-19 07:59:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:55,650 INFO L225 Difference]: With dead ends: 485 [2023-11-19 07:59:55,651 INFO L226 Difference]: Without dead ends: 294 [2023-11-19 07:59:55,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:59:55,652 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 219 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:55,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 470 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:59:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-19 07:59:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 207. [2023-11-19 07:59:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 144 states have (on average 1.3958333333333333) internal successors, (201), 144 states have internal predecessors, (201), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:59:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 321 transitions. [2023-11-19 07:59:55,685 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 321 transitions. Word has length 200 [2023-11-19 07:59:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:55,686 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 321 transitions. [2023-11-19 07:59:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-19 07:59:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 321 transitions. [2023-11-19 07:59:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:59:55,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:55,689 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:55,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:59:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:55,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:55,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1133348500, now seen corresponding path program 1 times [2023-11-19 07:59:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013256993] [2023-11-19 07:59:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:55,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:59:55,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54448115] [2023-11-19 07:59:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:55,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:55,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_439b7f4a-2610-405a-a4c0-8d0b88d63e83/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:59:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:56,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:59:56,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1053 proven. 180 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-11-19 08:00:02,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:06,337 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~var_1_22~0 256))) (let ((.cse12 (< 254 .cse1)) (.cse11 (* (- 2) .cse1)) (.cse6 (* 2 .cse1)) (.cse9 (+ c_~var_1_30~0 .cse1 c_~var_1_11~0))) (let ((.cse4 (forall ((v_z_12 Int)) (let ((.cse21 (+ c_~var_1_30~0 v_z_12 c_~var_1_11~0))) (or (forall ((v_y_12 Int)) (let ((.cse20 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse20) (< .cse20 0)))) (< 255 v_z_12) (< v_z_12 0) (= .cse21 0) (< c_~var_1_8~0 (* v_z_12 2)) (not (= (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0) .cse21)))))) (.cse5 (or .cse12 (forall ((v_y_12 Int)) (let ((.cse19 (* v_y_12 512)) (.cse18 (* v_y_12 256))) (or (not (= .cse9 (+ .cse18 (mod (+ .cse11 c_~var_1_8~0 .cse19) c_~var_1_4~0)))) (< (+ .cse18 255) .cse1) (< .cse1 .cse18) (< (+ c_~var_1_8~0 .cse19) .cse6) (= .cse18 .cse9)))))) (.cse3 (+ c_~var_1_8~0 1))) (and (or (< 0 (+ c_~var_1_4~0 1)) (and (forall ((v_z_12 Int)) (let ((.cse0 (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0))) (or (= .cse0 0) (forall ((v_y_12 Int)) (let ((.cse2 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse2) (< .cse2 0)))) (< (* v_z_12 2) .cse3) (< 255 v_z_12) (not (= (+ .cse0 c_~var_1_4~0) (+ c_~var_1_30~0 v_z_12 c_~var_1_11~0))) (< v_z_12 0)))) .cse4 .cse5 (or (forall ((v_y_12 Int)) (let ((.cse7 (* v_y_12 512))) (let ((.cse10 (mod (+ .cse11 c_~var_1_8~0 .cse7) c_~var_1_4~0)) (.cse8 (* v_y_12 256))) (or (< .cse6 (+ c_~var_1_8~0 .cse7 1)) (< (+ .cse8 255) .cse1) (not (= .cse9 (+ .cse8 c_~var_1_4~0 .cse10))) (= .cse10 0) (< .cse1 .cse8))))) .cse12))) (or (< c_~var_1_4~0 0) (and .cse4 .cse5 (or (forall ((v_y_12 Int)) (let ((.cse13 (* v_y_12 512))) (let ((.cse15 (mod (+ .cse11 c_~var_1_8~0 .cse13) c_~var_1_4~0)) (.cse14 (* v_y_12 256))) (or (< .cse6 (+ c_~var_1_8~0 .cse13 1)) (< (+ .cse14 255) .cse1) (not (= (+ c_~var_1_4~0 c_~var_1_30~0 .cse1 c_~var_1_11~0) (+ .cse14 .cse15))) (= .cse15 0) (< .cse1 .cse14))))) .cse12) (forall ((v_z_12 Int)) (let ((.cse16 (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0))) (or (= .cse16 0) (forall ((v_y_12 Int)) (let ((.cse17 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse17) (< .cse17 0)))) (< (* v_z_12 2) .cse3) (< 255 v_z_12) (< v_z_12 0) (not (= .cse16 (+ c_~var_1_4~0 c_~var_1_30~0 v_z_12 c_~var_1_11~0)))))))))))) is different from false [2023-11-19 08:00:12,639 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~var_1_22~0 256))) (let ((.cse11 (* (- 2) .cse1)) (.cse10 (+ c_~var_1_30~0 .cse1)) (.cse6 (* 2 .cse1)) (.cse12 (< 254 .cse1))) (let ((.cse3 (+ c_~var_1_8~0 1)) (.cse4 (forall ((v_z_12 Int)) (let ((.cse21 (+ c_~var_1_30~0 v_z_12))) (or (forall ((v_y_12 Int)) (let ((.cse20 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse20) (< .cse20 0)))) (< 255 v_z_12) (< v_z_12 0) (= .cse21 0) (not (= (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0) .cse21)) (< c_~var_1_8~0 (* v_z_12 2)))))) (.cse5 (or (forall ((v_y_12 Int)) (let ((.cse18 (* v_y_12 256)) (.cse19 (* v_y_12 512))) (or (not (= .cse10 (+ .cse18 (mod (+ .cse11 c_~var_1_8~0 .cse19) c_~var_1_4~0)))) (< (+ .cse18 255) .cse1) (< .cse1 .cse18) (= .cse18 .cse10) (< (+ c_~var_1_8~0 .cse19) .cse6)))) .cse12))) (and (or (< 0 (+ c_~var_1_4~0 1)) (and (forall ((v_z_12 Int)) (let ((.cse0 (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0))) (or (= .cse0 0) (forall ((v_y_12 Int)) (let ((.cse2 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse2) (< .cse2 0)))) (< (* v_z_12 2) .cse3) (< 255 v_z_12) (< v_z_12 0) (not (= (+ .cse0 c_~var_1_4~0) (+ c_~var_1_30~0 v_z_12)))))) .cse4 .cse5 (or (forall ((v_y_12 Int)) (let ((.cse7 (* v_y_12 512))) (let ((.cse9 (mod (+ .cse11 c_~var_1_8~0 .cse7) c_~var_1_4~0)) (.cse8 (* v_y_12 256))) (or (< .cse6 (+ c_~var_1_8~0 .cse7 1)) (not (= (+ .cse8 c_~var_1_4~0 .cse9) .cse10)) (< (+ .cse8 255) .cse1) (= .cse9 0) (< .cse1 .cse8))))) .cse12))) (or (and (forall ((v_z_12 Int)) (let ((.cse13 (mod (+ (* (- 2) v_z_12) c_~var_1_8~0) c_~var_1_4~0))) (or (= .cse13 0) (forall ((v_y_12 Int)) (let ((.cse14 (+ (* v_y_12 256) v_z_12))) (or (< .cse1 .cse14) (< .cse14 0)))) (< (* v_z_12 2) .cse3) (< 255 v_z_12) (< v_z_12 0) (not (= .cse13 (+ c_~var_1_4~0 c_~var_1_30~0 v_z_12)))))) (or (forall ((v_y_12 Int)) (let ((.cse15 (* v_y_12 512))) (let ((.cse17 (mod (+ .cse11 c_~var_1_8~0 .cse15) c_~var_1_4~0)) (.cse16 (* v_y_12 256))) (or (< .cse6 (+ c_~var_1_8~0 .cse15 1)) (< (+ .cse16 255) .cse1) (not (= (+ c_~var_1_4~0 c_~var_1_30~0 .cse1) (+ .cse16 .cse17))) (= .cse17 0) (< .cse1 .cse16))))) .cse12) .cse4 .cse5) (< c_~var_1_4~0 0)))))) is different from false [2023-11-19 08:00:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013256993] [2023-11-19 08:00:22,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54448115] [2023-11-19 08:00:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54448115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:22,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-19 08:00:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475681238] [2023-11-19 08:00:22,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:00:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:00:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=8, NotChecked=94, Total=702 [2023-11-19 08:00:22,311 INFO L87 Difference]: Start difference. First operand 207 states and 321 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-19 08:00:24,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:00:26,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:00:29,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:00:32,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:00:35,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]