./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --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 e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:35:03,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:35:03,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:35:03,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:35:03,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:35:03,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:35:03,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:35:03,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:35:03,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:35:03,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:35:03,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:35:03,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:35:03,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:35:03,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:35:03,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:35:03,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:35:03,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:35:03,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:35:03,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:35:03,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:35:03,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:35:03,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:35:03,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:35:03,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:35:03,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:35:03,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:35:03,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:35:03,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:35:03,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:35:03,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:35:03,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:35:03,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:35:03,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:35:03,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:35:03,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:35:03,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:35:03,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:35:03,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:35:03,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:35:03,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:35:03,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:35:03,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:35:03,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:35:03,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:35:03,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:35:03,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:35:03,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:35:03,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:35:03,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:35:03,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:35:03,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:35:03,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:35:03,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:35:03,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:35:03,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:35:03,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:35:03,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:35:03,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:35:03,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:35:03,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:35:03,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:35:03,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:35:03,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:35:03,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:35:03,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:35:03,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:35:03,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:35:03,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:35:03,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:35:03,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:35:03,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:35:03,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 [2021-12-06 17:35:03,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:35:03,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:35:03,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:35:03,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:35:03,320 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:35:03,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-12-06 17:35:03,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/4980cd0e6/bb72a24d58ff4135a7bbb6dc7bfb7d14/FLAGf7cd41350 [2021-12-06 17:35:03,759 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:35:03,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-12-06 17:35:03,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/4980cd0e6/bb72a24d58ff4135a7bbb6dc7bfb7d14/FLAGf7cd41350 [2021-12-06 17:35:03,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/4980cd0e6/bb72a24d58ff4135a7bbb6dc7bfb7d14 [2021-12-06 17:35:03,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:35:03,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:35:03,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:35:03,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:35:03,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:35:03,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3fa2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03, skipping insertion in model container [2021-12-06 17:35:03,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:35:03,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:35:03,914 WARN L230 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_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-12-06 17:35:03,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:35:03,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:35:03,946 WARN L230 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_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-12-06 17:35:03,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:35:03,965 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:35:03,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03 WrapperNode [2021-12-06 17:35:03,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:35:03,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:35:03,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:35:03,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:35:03,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,991 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-06 17:35:03,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:35:03,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:35:03,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:35:03,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:35:03,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:03,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:04,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:04,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:04,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:04,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:35:04,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:35:04,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:35:04,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:35:04,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (1/1) ... [2021-12-06 17:35:04,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:35:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:04,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:35:04,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:35:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:35:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 17:35:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 17:35:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:35:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:35:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:35:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 17:35:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 17:35:04,122 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:35:04,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:35:04,227 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:35:04,232 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:35:04,233 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:35:04,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:35:04 BoogieIcfgContainer [2021-12-06 17:35:04,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:35:04,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:35:04,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:35:04,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:35:04,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:35:03" (1/3) ... [2021-12-06 17:35:04,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6277c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:35:04, skipping insertion in model container [2021-12-06 17:35:04,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:35:03" (2/3) ... [2021-12-06 17:35:04,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6277c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:35:04, skipping insertion in model container [2021-12-06 17:35:04,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:35:04" (3/3) ... [2021-12-06 17:35:04,240 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2021-12-06 17:35:04,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:35:04,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:35:04,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:35:04,286 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:35:04,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:35:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 17:35:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:35:04,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:04,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:04,303 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2021-12-06 17:35:04,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580959055] [2021-12-06 17:35:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:35:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 17:35:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 17:35:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:35:04,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580959055] [2021-12-06 17:35:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580959055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:04,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:04,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:35:04,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367293360] [2021-12-06 17:35:04,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:04,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:35:04,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:35:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:35:04,488 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:35:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:04,505 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2021-12-06 17:35:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:35:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-12-06 17:35:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:04,514 INFO L225 Difference]: With dead ends: 63 [2021-12-06 17:35:04,515 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:35:04,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:35:04,522 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2021-12-06 17:35:04,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:35:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 17:35:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:35:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-12-06 17:35:04,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-12-06 17:35:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:04,562 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-12-06 17:35:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:35:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-12-06 17:35:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:35:04,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:04,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:04,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:35:04,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2021-12-06 17:35:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:04,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768309803] [2021-12-06 17:35:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:35:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 17:35:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 17:35:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:35:04,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:04,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768309803] [2021-12-06 17:35:04,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768309803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:04,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:04,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:04,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903899437] [2021-12-06 17:35:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:04,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:04,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:04,658 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:35:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:04,699 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-06 17:35:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:35:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-06 17:35:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:04,700 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:35:04,700 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:35:04,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:04,702 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:04,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 134 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:35:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-06 17:35:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:35:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-06 17:35:04,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2021-12-06 17:35:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:04,712 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-06 17:35:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:35:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-06 17:35:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:35:04,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:04,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:04,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:35:04,714 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2021-12-06 17:35:04,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530126790] [2021-12-06 17:35:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:35:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 17:35:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 17:35:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 17:35:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:35:04,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530126790] [2021-12-06 17:35:04,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530126790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:04,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:04,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:04,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919330157] [2021-12-06 17:35:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:04,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:04,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:04,799 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:35:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:04,841 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-12-06 17:35:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:35:04,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-06 17:35:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:04,843 INFO L225 Difference]: With dead ends: 46 [2021-12-06 17:35:04,843 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 17:35:04,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:04,845 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:04,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 17:35:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-06 17:35:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:35:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-06 17:35:04,852 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2021-12-06 17:35:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:04,853 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-06 17:35:04,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:35:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-06 17:35:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:35:04,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:04,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:04,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:35:04,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2021-12-06 17:35:04,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:04,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428513241] [2021-12-06 17:35:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:04,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:04,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118627951] [2021-12-06 17:35:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:04,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:04,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:35:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:35:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:35:05,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:05,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428513241] [2021-12-06 17:35:05,019 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118627951] [2021-12-06 17:35:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118627951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:05,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:05,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:05,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522211329] [2021-12-06 17:35:05,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:05,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:05,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:05,021 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:05,071 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-12-06 17:35:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-06 17:35:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:05,072 INFO L225 Difference]: With dead ends: 65 [2021-12-06 17:35:05,072 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 17:35:05,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:05,074 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:05,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 17:35:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 17:35:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 17:35:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-06 17:35:05,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2021-12-06 17:35:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:05,084 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-06 17:35:05,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:35:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-06 17:35:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:35:05,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:05,085 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:05,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:05,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 17:35:05,287 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2021-12-06 17:35:05,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:05,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145705338] [2021-12-06 17:35:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:05,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:05,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:05,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991956273] [2021-12-06 17:35:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:05,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:05,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:35:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:35:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:35:05,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:35:05,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145705338] [2021-12-06 17:35:05,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991956273] [2021-12-06 17:35:05,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991956273] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:05,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:35:05,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-06 17:35:05,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423197583] [2021-12-06 17:35:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:05,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:35:05,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:35:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:35:05,855 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:05,906 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-12-06 17:35:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-12-06 17:35:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:05,908 INFO L225 Difference]: With dead ends: 64 [2021-12-06 17:35:05,908 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 17:35:05,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:35:05,910 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:05,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 17:35:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-06 17:35:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 17:35:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-06 17:35:05,923 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2021-12-06 17:35:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:05,923 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-06 17:35:05,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-06 17:35:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:35:05,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:05,925 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:05,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:35:06,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:06,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2021-12-06 17:35:06,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:06,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786267711] [2021-12-06 17:35:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:06,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:06,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793069067] [2021-12-06 17:35:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:06,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:06,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:35:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:35:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 17:35:06,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 17:35:06,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:06,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786267711] [2021-12-06 17:35:06,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:06,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793069067] [2021-12-06 17:35:06,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793069067] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:06,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:35:06,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 17:35:06,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890910749] [2021-12-06 17:35:06,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:06,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:06,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:06,443 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:06,480 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-12-06 17:35:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2021-12-06 17:35:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:06,482 INFO L225 Difference]: With dead ends: 72 [2021-12-06 17:35:06,482 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:35:06,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:35:06,483 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:06,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:35:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-06 17:35:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 17:35:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-06 17:35:06,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2021-12-06 17:35:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:06,493 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-06 17:35:06,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-06 17:35:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:35:06,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:06,494 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:06,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:35:06,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:06,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2021-12-06 17:35:06,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:06,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762343011] [2021-12-06 17:35:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:06,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:06,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:06,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138308205] [2021-12-06 17:35:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:06,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:06,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:06,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:06,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:35:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:35:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 17:35:06,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:06,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762343011] [2021-12-06 17:35:06,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138308205] [2021-12-06 17:35:06,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138308205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:06,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:06,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:06,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22280737] [2021-12-06 17:35:06,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:06,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:06,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:06,901 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:35:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:06,942 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-12-06 17:35:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-12-06 17:35:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:06,944 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:35:06,945 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:35:06,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:06,946 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:06,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:35:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-06 17:35:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 17:35:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-12-06 17:35:06,955 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2021-12-06 17:35:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:06,955 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-12-06 17:35:06,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:35:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-12-06 17:35:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:35:06,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:06,957 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:06,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:35:07,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:35:07,159 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2021-12-06 17:35:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:07,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448833597] [2021-12-06 17:35:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:07,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:07,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136829598] [2021-12-06 17:35:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:07,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:07,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:07,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:35:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:35:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 17:35:07,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 17:35:09,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448833597] [2021-12-06 17:35:09,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136829598] [2021-12-06 17:35:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136829598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:09,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:09,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-06 17:35:09,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189001668] [2021-12-06 17:35:09,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:09,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:35:09,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:09,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:35:09,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:35:09,171 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 17:35:25,490 WARN L227 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 51 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:35:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:29,411 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2021-12-06 17:35:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:35:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2021-12-06 17:35:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:29,413 INFO L225 Difference]: With dead ends: 165 [2021-12-06 17:35:29,413 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 17:35:29,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:35:29,415 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:29,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 311 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-06 17:35:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 17:35:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2021-12-06 17:35:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 17:35:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2021-12-06 17:35:29,428 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 71 [2021-12-06 17:35:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:29,428 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2021-12-06 17:35:29,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 17:35:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2021-12-06 17:35:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 17:35:29,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:29,429 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:29,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:35:29,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:29,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2021-12-06 17:35:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396473320] [2021-12-06 17:35:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:29,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:29,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:29,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910841891] [2021-12-06 17:35:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:29,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:29,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:29,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:35:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:35:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-06 17:35:30,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-06 17:35:32,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396473320] [2021-12-06 17:35:32,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910841891] [2021-12-06 17:35:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910841891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:32,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-12-06 17:35:32,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998912338] [2021-12-06 17:35:32,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:32,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:35:32,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:35:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:35:32,198 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 17:35:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:32,845 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2021-12-06 17:35:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:35:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 82 [2021-12-06 17:35:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:32,847 INFO L225 Difference]: With dead ends: 142 [2021-12-06 17:35:32,847 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 17:35:32,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:35:32,848 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:32,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 242 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:35:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 17:35:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-06 17:35:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 17:35:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2021-12-06 17:35:32,857 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 82 [2021-12-06 17:35:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:32,858 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2021-12-06 17:35:32,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 17:35:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2021-12-06 17:35:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:35:32,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:32,859 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:32,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:35:33,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:33,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2021-12-06 17:35:33,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:33,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402149987] [2021-12-06 17:35:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:33,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283311156] [2021-12-06 17:35:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:35:33,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:33,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:33,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:35:33,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:35:33,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:35:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-06 17:35:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-06 17:35:33,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402149987] [2021-12-06 17:35:33,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283311156] [2021-12-06 17:35:33,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283311156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:33,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:33,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-12-06 17:35:33,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569251120] [2021-12-06 17:35:33,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:33,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:33,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:33,267 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-06 17:35:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:33,319 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2021-12-06 17:35:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:35:33,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2021-12-06 17:35:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:33,321 INFO L225 Difference]: With dead ends: 121 [2021-12-06 17:35:33,321 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 17:35:33,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:33,322 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:33,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 17:35:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-06 17:35:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 17:35:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2021-12-06 17:35:33,334 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 84 [2021-12-06 17:35:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:33,334 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2021-12-06 17:35:33,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-06 17:35:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2021-12-06 17:35:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:35:33,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:33,336 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:33,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:35:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:35:33,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2021-12-06 17:35:33,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707761918] [2021-12-06 17:35:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:33,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:33,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500147358] [2021-12-06 17:35:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:33,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:33,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:33,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:33,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:35:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:35:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-06 17:35:33,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-06 17:35:34,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707761918] [2021-12-06 17:35:34,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500147358] [2021-12-06 17:35:34,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500147358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:34,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:34,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 17:35:34,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783210802] [2021-12-06 17:35:34,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:34,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:35:34,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:35:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:35:34,065 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-06 17:35:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:34,337 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2021-12-06 17:35:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:35:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 87 [2021-12-06 17:35:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:34,338 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:35:34,338 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:35:34,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:35:34,339 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:34,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 333 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:35:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:35:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-06 17:35:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 17:35:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-12-06 17:35:34,346 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 87 [2021-12-06 17:35:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:34,346 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-12-06 17:35:34,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-06 17:35:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-12-06 17:35:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 17:35:34,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:34,347 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:34,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:34,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:35:34,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2021-12-06 17:35:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:34,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368674414] [2021-12-06 17:35:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:34,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:34,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:34,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144857582] [2021-12-06 17:35:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:34,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:34,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:34,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:35:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:35:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-06 17:35:34,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:34,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368674414] [2021-12-06 17:35:34,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:35:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144857582] [2021-12-06 17:35:34,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144857582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:34,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:34,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:34,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543330166] [2021-12-06 17:35:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:34,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:34,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:34,734 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 17:35:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:34,819 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2021-12-06 17:35:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-12-06 17:35:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:34,821 INFO L225 Difference]: With dead ends: 97 [2021-12-06 17:35:34,821 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 17:35:34,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:34,821 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:34,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 89 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:35:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 17:35:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 17:35:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 17:35:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-12-06 17:35:34,828 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 91 [2021-12-06 17:35:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:34,828 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-12-06 17:35:34,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 17:35:34,828 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-12-06 17:35:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 17:35:34,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:34,829 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:34,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:35:35,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:35:35,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:35:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2021-12-06 17:35:35,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139638891] [2021-12-06 17:35:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:35,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:35,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:35:35,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655672589] [2021-12-06 17:35:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:35:35,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:35,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:35,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:35,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:35:35,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:35:35,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:35:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 67 proven. 25 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-06 17:35:35,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:14,165 WARN L227 SmtUtils]: Spent 18.86s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:37:46,463 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse14 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse15 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse18 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse9 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse6 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse13 (* .cse9 |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (and (not .cse18) (< |c_ULTIMATE.start_main_~d~0#1| 0))) (.cse17 (+ .cse15 1)) (.cse20 (* .cse9 .cse14)) (.cse19 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (let ((.cse11 (+ .cse9 .cse20))) (or (let ((.cse10 (+ .cse14 1))) (let ((.cse0 (= (mod .cse10 2) 0)) (.cse12 (* .cse9 (div .cse10 2)))) (let ((.cse4 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| .cse13)) (.cse3 (not .cse0)) (.cse2 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| .cse13 .cse9)) (.cse5 (div .cse11 2)) (.cse7 (= (mod (* .cse9 .cse10) 2) 0))) (and (or (let ((.cse1 (+ .cse5 .cse6 1))) (and (or .cse0 (= .cse1 .cse2)) (or .cse3 (= .cse1 .cse4)))) .cse7) (or (let ((.cse8 (+ .cse5 .cse6))) (and (or (= .cse8 .cse4) .cse3) (or (= .cse8 .cse2) .cse0))) (not .cse7)))))) (and (or (not (= .cse15 .cse11)) .cse16) (or (not (= .cse11 .cse17)) .cse18)) .cse19 (<= 0 |c_ULTIMATE.start_main_~p~0#1|))) (or (let ((.cse29 (* .cse9 (div .cse14 2))) (.cse26 (= (mod .cse14 2) 0))) (let ((.cse21 (= (mod .cse20 2) 0)) (.cse24 (not .cse26)) (.cse23 (+ |c_ULTIMATE.start_main_~r~0#1| .cse13 .cse29)) (.cse25 (+ |c_ULTIMATE.start_main_~r~0#1| .cse13 .cse29 .cse9)) (.cse27 (div .cse20 2))) (and (or .cse21 (<= 0 .cse20) (let ((.cse22 (+ .cse6 .cse27 1))) (and (or (= .cse22 .cse23) .cse24) (or (= .cse25 .cse22) .cse26)))) (or (and (< .cse20 0) (not .cse21)) (let ((.cse28 (+ .cse6 .cse27))) (and (or (and (< .cse14 0) .cse24) (= .cse28 .cse23)) (or (= .cse25 .cse28) .cse26 (<= 0 .cse14)))))))) (and (or (not (= .cse15 .cse20)) .cse16) (or (not (= .cse17 .cse20)) .cse18 (<= 0 |c_ULTIMATE.start_main_~d~0#1|))) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse19)))))) is different from true [2021-12-06 17:43:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 61 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 16 not checked. [2021-12-06 17:43:37,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139638891] [2021-12-06 17:43:37,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:43:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655672589] [2021-12-06 17:43:37,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655672589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:37,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:43:37,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2021-12-06 17:43:37,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058665841] [2021-12-06 17:43:37,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:37,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:43:37,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:43:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=346, Unknown=1, NotChecked=38, Total=462 [2021-12-06 17:43:37,947 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-12-06 17:43:39,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 17:44:45,848 WARN L227 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 130 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:45:04,339 WARN L227 SmtUtils]: Spent 15.65s on a formula simplification. DAG size of input: 52 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:45:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:06,799 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2021-12-06 17:45:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:45:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 101 [2021-12-06 17:45:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:06,801 INFO L225 Difference]: With dead ends: 159 [2021-12-06 17:45:06,801 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 17:45:06,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 107.3s TimeCoverageRelationStatistics Valid=166, Invalid=707, Unknown=1, NotChecked=56, Total=930 [2021-12-06 17:45:06,803 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 87 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 239 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:06,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 370 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 594 Invalid, 1 Unknown, 89 Unchecked, 6.5s Time] [2021-12-06 17:45:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 17:45:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2021-12-06 17:45:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 77 states have internal predecessors, (81), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 17:45:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2021-12-06 17:45:06,814 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 101 [2021-12-06 17:45:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2021-12-06 17:45:06,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-12-06 17:45:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2021-12-06 17:45:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 17:45:06,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:06,815 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:06,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:45:07,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:45:07,017 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2021-12-06 17:45:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487317795] [2021-12-06 17:45:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:07,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:45:07,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033028326] [2021-12-06 17:45:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:45:07,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:07,032 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:07,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:45:07,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:45:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:45:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:13,106 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| Int) (|aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63| Int) (|aux_div_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63| Int) (|aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_94_62_73| Int)) (let ((.cse3 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_94_62_73|)) (.cse0 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176|)) (.cse1 (* 4294967296 |aux_div_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63|)) (.cse2 (* 2 (mod (+ (* |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| 4294967295) 4294967295) 4294967296)))) (and (<= (+ .cse0 |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| .cse1) 4294967295) (< 0 (+ .cse2 .cse3)) (< .cse3 4294967296) (< 0 (+ .cse0 |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| 1)) (<= 1 |c___VERIFIER_assert_#in~cond|) (< 0 |aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (< (div (+ (* 8589934592 |aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| |aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (* 2 |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| |aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (* (- 4294967295) |aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (* (- 2) |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176|) (* 8589934592 |aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63| |aux_div_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63|) (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| |aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) 8589934590 .cse1 (* (- 8589934590) |aux_div_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (* (- 8589934592) |aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176|) (* |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| |aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (* 4294967296 |aux_div_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63| |aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|)) (- 8589934592)) (+ |aux_div_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176| 1)) (<= 0 |aux_mod_v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_94_63|) (< .cse2 4294967296) (<= 0 |aux_mod_aux_mod_v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_123_63_176|)))) is different from true [2021-12-06 17:45:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 66 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 17:45:13,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:18,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:18,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487317795] [2021-12-06 17:45:18,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:45:18,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033028326] [2021-12-06 17:45:18,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033028326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:18,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:45:18,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-06 17:45:18,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636142592] [2021-12-06 17:45:18,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:18,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:45:18,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:45:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=390, Unknown=1, NotChecked=40, Total=506 [2021-12-06 17:45:18,058 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-06 17:45:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:32,174 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2021-12-06 17:45:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:45:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 112 [2021-12-06 17:45:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:32,176 INFO L225 Difference]: With dead ends: 135 [2021-12-06 17:45:32,176 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 17:45:32,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=113, Invalid=588, Unknown=5, NotChecked=50, Total=756 [2021-12-06 17:45:32,177 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:32,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 417 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 476 Invalid, 0 Unknown, 89 Unchecked, 2.1s Time] [2021-12-06 17:45:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 17:45:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-06 17:45:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 79 states have internal predecessors, (83), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 17:45:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2021-12-06 17:45:32,188 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 112 [2021-12-06 17:45:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:32,188 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2021-12-06 17:45:32,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-06 17:45:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2021-12-06 17:45:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 17:45:32,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:32,189 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:32,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:45:32,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:32,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1560875064, now seen corresponding path program 4 times [2021-12-06 17:45:32,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:32,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877277178] [2021-12-06 17:45:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:32,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:32,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:45:32,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234639936] [2021-12-06 17:45:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:45:32,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:32,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:32,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:45:32,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:45:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:32,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:45:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-06 17:45:32,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-06 17:45:32,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877277178] [2021-12-06 17:45:32,807 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:45:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234639936] [2021-12-06 17:45:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234639936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:32,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:32,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-06 17:45:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676632025] [2021-12-06 17:45:32,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:45:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:45:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:45:32,808 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 17:45:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:32,945 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2021-12-06 17:45:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:45:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 114 [2021-12-06 17:45:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:32,947 INFO L225 Difference]: With dead ends: 144 [2021-12-06 17:45:32,947 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 17:45:32,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:45:32,948 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:32,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 287 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:45:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 17:45:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-12-06 17:45:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 17:45:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2021-12-06 17:45:32,960 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 114 [2021-12-06 17:45:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:32,960 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2021-12-06 17:45:32,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 17:45:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2021-12-06 17:45:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 17:45:32,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:32,962 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:32,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 17:45:33,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:33,164 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash 546247585, now seen corresponding path program 3 times [2021-12-06 17:45:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011617608] [2021-12-06 17:45:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:33,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:33,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:45:33,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856315912] [2021-12-06 17:45:33,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:45:33,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:33,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:33,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:45:33,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:45:33,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:33,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:45:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-06 17:45:33,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-06 17:45:34,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011617608] [2021-12-06 17:45:34,596 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:45:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856315912] [2021-12-06 17:45:34,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856315912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:34,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:34,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-12-06 17:45:34,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556835757] [2021-12-06 17:45:34,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:34,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:45:34,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:45:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:45:34,597 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 17:45:48,818 WARN L227 SmtUtils]: Spent 14.17s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:46:13,111 WARN L227 SmtUtils]: Spent 18.65s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:46:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:13,154 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-12-06 17:46:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:46:13,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 129 [2021-12-06 17:46:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:13,156 INFO L225 Difference]: With dead ends: 117 [2021-12-06 17:46:13,156 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 17:46:13,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:46:13,157 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:13,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 14 Unchecked, 0.4s Time] [2021-12-06 17:46:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 17:46:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-06 17:46:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 17:46:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2021-12-06 17:46:13,169 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 129 [2021-12-06 17:46:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:13,170 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2021-12-06 17:46:13,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 17:46:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2021-12-06 17:46:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 17:46:13,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:13,171 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:13,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:46:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:13,372 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1330691261, now seen corresponding path program 5 times [2021-12-06 17:46:13,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:13,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910809923] [2021-12-06 17:46:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:13,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:13,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:46:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416708172] [2021-12-06 17:46:13,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:46:13,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:13,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:13,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:46:13,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 17:46:13,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 17:46:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 134 proven. 121 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-12-06 17:46:14,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:55,824 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (or (not (= (* .cse0 |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (= |c_ULTIMATE.start_main_~p~0#1| 1) (let ((.cse21 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse30 (+ .cse21 1))) (let ((.cse20 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse3 (= (mod .cse30 2) 0)) (.cse27 (div .cse30 2)) (.cse29 (div .cse21 2)) (.cse28 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse12 (= (mod .cse21 2) 0)) (.cse10 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0))) (let ((.cse11 (not .cse10)) (.cse14 (not .cse12)) (.cse15 (+ .cse21 .cse29 .cse28)) (.cse13 (+ .cse21 .cse29 .cse28 1)) (.cse5 (+ .cse21 2 .cse27 .cse28)) (.cse6 (+ .cse21 .cse27 .cse28 1)) (.cse7 (not .cse3)) (.cse17 (* .cse0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse18 (* .cse0 .cse20)) (.cse1 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or .cse1 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) (let ((.cse19 (+ .cse20 1))) (let ((.cse16 (* .cse0 (div .cse19 2))) (.cse8 (= (mod .cse19 2) 0))) (let ((.cse2 (not .cse8)) (.cse4 (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17 .cse0 .cse18)) (.cse9 (+ .cse16 (* 2 .cse0) |c_ULTIMATE.start_main_~r~0#1| .cse17 .cse18))) (and (or (and (or .cse2 (and (or .cse3 (= .cse4 .cse5)) (or (= .cse4 .cse6) .cse7))) (or .cse8 (and (or .cse7 (= .cse9 .cse6)) (or .cse3 (= .cse9 .cse5))))) .cse10) (or .cse11 (and (or .cse2 (and (or .cse12 (= .cse4 .cse13)) (or .cse14 (= .cse4 .cse15)))) (or .cse8 (and (or (= .cse9 .cse13) .cse12) (or .cse14 (= .cse9 .cse15))))))))))) (or (let ((.cse24 (= (mod .cse20 2) 0)) (.cse26 (* .cse0 (div .cse20 2)))) (let ((.cse22 (+ |c_ULTIMATE.start_main_~r~0#1| .cse17 .cse26 .cse18)) (.cse23 (not .cse24)) (.cse25 (+ |c_ULTIMATE.start_main_~r~0#1| .cse17 .cse26 .cse0 .cse18))) (and (or (and .cse11 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (and (or (and (or (<= 0 .cse21) .cse12 (= .cse22 .cse13)) (or (and .cse14 (< .cse21 0)) (= .cse22 .cse15))) (and (< .cse20 0) .cse23)) (or .cse24 (<= 0 .cse20) (and (or .cse14 (= .cse15 .cse25)) (or .cse12 (= .cse13 .cse25)))))) (or (and (or (and (or (= .cse22 .cse6) .cse7) (or (= .cse22 .cse5) .cse3)) .cse23) (or (and (or .cse3 (= .cse5 .cse25)) (or (= .cse6 .cse25) .cse7)) .cse24)) .cse10 (<= 0 |c_ULTIMATE.start_main_~d~0#1|))))) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse1)) (= .cse20 1))))))))) is different from true [2021-12-06 17:47:56,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910809923] [2021-12-06 17:47:56,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:47:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416708172] [2021-12-06 17:47:56,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger: modulus not positive [2021-12-06 17:47:56,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:47:56,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-06 17:47:56,790 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-06 17:47:56,790 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-06 17:47:56,795 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 17:47:56,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:47:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:47:57,007 INFO L732 BasicCegarLoop]: Path program histogram: [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:47:57,013 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 17:47:57,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 05:47:57 BoogieIcfgContainer [2021-12-06 17:47:57,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 17:47:57,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 17:47:57,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 17:47:57,048 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 17:47:57,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:35:04" (3/4) ... [2021-12-06 17:47:57,051 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 17:47:57,051 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 17:47:57,051 INFO L158 Benchmark]: Toolchain (without parser) took 773271.97ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 71.0MB in the beginning and 98.7MB in the end (delta: -27.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:47:57,052 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 87.1MB in the end (delta: 137.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:47:57,052 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.66ms. Allocated memory is still 109.1MB. Free memory was 70.9MB in the beginning and 60.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 17:47:57,052 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.73ms. Allocated memory is still 109.1MB. Free memory was 60.7MB in the beginning and 59.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:47:57,053 INFO L158 Benchmark]: Boogie Preprocessor took 15.57ms. Allocated memory is still 109.1MB. Free memory was 59.1MB in the beginning and 58.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:47:57,053 INFO L158 Benchmark]: RCFGBuilder took 226.66ms. Allocated memory is still 109.1MB. Free memory was 58.1MB in the beginning and 48.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 17:47:57,053 INFO L158 Benchmark]: TraceAbstraction took 772812.19ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 47.7MB in the beginning and 99.7MB in the end (delta: -52.0MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2021-12-06 17:47:57,053 INFO L158 Benchmark]: Witness Printer took 3.05ms. Allocated memory is still 134.2MB. Free memory is still 98.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:47:57,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 87.1MB in the end (delta: 137.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.66ms. Allocated memory is still 109.1MB. Free memory was 70.9MB in the beginning and 60.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.73ms. Allocated memory is still 109.1MB. Free memory was 60.7MB in the beginning and 59.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.57ms. Allocated memory is still 109.1MB. Free memory was 59.1MB in the beginning and 58.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 226.66ms. Allocated memory is still 109.1MB. Free memory was 58.1MB in the beginning and 48.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 772812.19ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 47.7MB in the beginning and 99.7MB in the end (delta: -52.0MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. * Witness Printer took 3.05ms. Allocated memory is still 134.2MB. Free memory is still 98.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L26] CALL assume_abort_if_not(A>=0 && A<=100) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=100) [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B>=0 && B<=100) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=100) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND TRUE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 772.7s, OverallIterations: 17, TraceHistogramMax: 19, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 163.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 326 SdHoareTripleChecker+Valid, 14.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 276 mSDsluCounter, 3168 SdHoareTripleChecker+Invalid, 13.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 192 IncrementalHoareTripleChecker+Unchecked, 2471 mSDsCounter, 482 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2084 IncrementalHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 482 mSolverCounterUnsat, 697 mSDtfsCounter, 2084 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1880 GetRequests, 1706 SyntacticMatches, 13 SemanticMatches, 161 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 180.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=14, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 80 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 604.5s InterpolantComputationTime, 1257 NumberOfCodeBlocks, 1173 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1991 ConstructedInterpolants, 2 QuantifiedInterpolants, 16438 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2508 ConjunctsInSsa, 297 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 6286/6692 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 17:47:57,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --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 e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:47:58,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:47:58,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:47:58,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:47:58,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:47:58,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:47:58,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:47:58,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:47:58,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:47:58,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:47:58,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:47:58,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:47:58,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:47:58,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:47:58,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:47:58,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:47:58,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:47:58,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:47:58,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:47:58,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:47:58,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:47:58,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:47:58,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:47:58,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:47:58,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:47:58,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:47:58,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:47:58,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:47:58,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:47:58,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:47:58,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:47:58,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:47:58,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:47:58,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:47:58,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:47:58,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:47:58,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:47:58,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:47:58,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:47:58,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:47:58,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:47:58,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 17:47:58,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:47:58,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:47:58,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:47:58,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:47:58,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:47:58,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:47:58,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:47:58,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:47:58,664 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:47:58,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:47:58,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:47:58,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:47:58,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:47:58,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:47:58,667 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 17:47:58,668 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 [2021-12-06 17:47:58,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:47:58,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:47:58,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:47:58,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:47:58,923 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:47:58,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-12-06 17:47:58,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/1ea4cbbab/6381006c78a0483f82fc9bf029db8ca3/FLAG911160334 [2021-12-06 17:47:59,281 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:47:59,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-12-06 17:47:59,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/1ea4cbbab/6381006c78a0483f82fc9bf029db8ca3/FLAG911160334 [2021-12-06 17:47:59,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/data/1ea4cbbab/6381006c78a0483f82fc9bf029db8ca3 [2021-12-06 17:47:59,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:47:59,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:47:59,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:47:59,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:47:59,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:47:59,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3248d856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59, skipping insertion in model container [2021-12-06 17:47:59,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:47:59,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:47:59,816 WARN L230 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_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-12-06 17:47:59,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:47:59,836 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:47:59,850 WARN L230 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_001ed957-97f9-4985-93cc-3e3d41afe314/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2021-12-06 17:47:59,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:47:59,873 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:47:59,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59 WrapperNode [2021-12-06 17:47:59,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:47:59,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:47:59,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:47:59,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:47:59,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,903 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-06 17:47:59,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:47:59,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:47:59,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:47:59,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:47:59,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:47:59,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:47:59,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:47:59,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:47:59,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (1/1) ... [2021-12-06 17:47:59,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:47:59,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:59,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:47:59,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:47:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:47:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 17:47:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 17:47:59,982 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 17:47:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:47:59,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:47:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 17:47:59,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 17:48:00,030 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:48:00,031 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:48:00,498 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:48:00,504 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:48:00,504 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:48:00,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:00 BoogieIcfgContainer [2021-12-06 17:48:00,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:48:00,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:48:00,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:48:00,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:48:00,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:47:59" (1/3) ... [2021-12-06 17:48:00,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c56549c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:00, skipping insertion in model container [2021-12-06 17:48:00,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:59" (2/3) ... [2021-12-06 17:48:00,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c56549c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:00, skipping insertion in model container [2021-12-06 17:48:00,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:00" (3/3) ... [2021-12-06 17:48:00,514 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2021-12-06 17:48:00,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:48:00,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:48:00,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:48:00,562 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:48:00,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:48:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 17:48:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:48:00,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:00,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:00,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2021-12-06 17:48:00,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:00,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745211075] [2021-12-06 17:48:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:00,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:00,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:00,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 17:48:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 17:48:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:48:00,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:00,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:00,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745211075] [2021-12-06 17:48:00,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745211075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:00,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:00,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:48:00,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135744663] [2021-12-06 17:48:00,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:00,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:48:00,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:48:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:00,740 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:48:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:00,756 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2021-12-06 17:48:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:48:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-12-06 17:48:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:00,763 INFO L225 Difference]: With dead ends: 63 [2021-12-06 17:48:00,763 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:48:00,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:00,768 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2021-12-06 17:48:00,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:48:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 17:48:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:48:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-12-06 17:48:00,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-12-06 17:48:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:00,796 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-12-06 17:48:00,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:48:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-12-06 17:48:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:48:00,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:00,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:00,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:00,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:01,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2021-12-06 17:48:01,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:01,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276456488] [2021-12-06 17:48:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:01,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:01,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:01,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 17:48:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:48:01,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:48:01,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:01,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:01,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276456488] [2021-12-06 17:48:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276456488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:01,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:48:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557135630] [2021-12-06 17:48:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:01,172 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:48:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:01,327 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-06 17:48:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:01,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-06 17:48:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:01,330 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:48:01,330 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:48:01,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:01,332 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:01,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:48:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-06 17:48:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:48:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-06 17:48:01,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2021-12-06 17:48:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:01,342 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-06 17:48:01,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:48:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-06 17:48:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:48:01,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:01,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:01,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:48:01,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:01,545 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2021-12-06 17:48:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009390831] [2021-12-06 17:48:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:01,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:01,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:01,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:48:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:48:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:48:01,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:01,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009390831] [2021-12-06 17:48:01,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009390831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:01,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:01,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:48:01,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626095265] [2021-12-06 17:48:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:01,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:01,717 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:48:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:01,941 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-12-06 17:48:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-06 17:48:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:01,943 INFO L225 Difference]: With dead ends: 46 [2021-12-06 17:48:01,943 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 17:48:01,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:01,944 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:01,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 17:48:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-06 17:48:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 17:48:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-06 17:48:01,950 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2021-12-06 17:48:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:01,951 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-06 17:48:01,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:48:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-06 17:48:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:48:01,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:01,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:01,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 17:48:02,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:02,154 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2021-12-06 17:48:02,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103013038] [2021-12-06 17:48:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:02,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:02,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:02,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:48:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:02,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:48:02,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:48:02,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:48:03,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103013038] [2021-12-06 17:48:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103013038] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:03,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:48:03,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-06 17:48:03,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122710094] [2021-12-06 17:48:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:03,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:48:03,588 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:48:05,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:48:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:06,979 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-12-06 17:48:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-06 17:48:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:06,981 INFO L225 Difference]: With dead ends: 54 [2021-12-06 17:48:06,981 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 17:48:06,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:48:06,982 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:06,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 17:48:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 17:48:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-12-06 17:48:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 17:48:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-12-06 17:48:06,990 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 34 [2021-12-06 17:48:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-12-06 17:48:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:48:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-12-06 17:48:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:48:06,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:06,992 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:06,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:07,194 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2021-12-06 17:48:07,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005975564] [2021-12-06 17:48:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:07,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:07,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:07,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 17:48:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:48:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:48:07,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:48:09,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:09,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005975564] [2021-12-06 17:48:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005975564] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:09,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:48:09,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-06 17:48:09,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255157489] [2021-12-06 17:48:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:09,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:09,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:48:09,972 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:48:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:11,582 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-12-06 17:48:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-12-06 17:48:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:11,589 INFO L225 Difference]: With dead ends: 62 [2021-12-06 17:48:11,589 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 17:48:11,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:48:11,590 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:11,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:48:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 17:48:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-12-06 17:48:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 17:48:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2021-12-06 17:48:11,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 41 [2021-12-06 17:48:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2021-12-06 17:48:11,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:48:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2021-12-06 17:48:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:48:11,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:11,601 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:11,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 17:48:11,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:11,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2021-12-06 17:48:11,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:11,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673793355] [2021-12-06 17:48:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:11,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:11,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:11,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:48:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:48:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 17:48:12,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 17:48:13,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673793355] [2021-12-06 17:48:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673793355] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:13,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:48:13,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-12-06 17:48:13,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249637665] [2021-12-06 17:48:13,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:13,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:13,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:48:13,716 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 17:48:16,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:48:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:17,351 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2021-12-06 17:48:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-12-06 17:48:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:17,353 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:48:17,353 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:48:17,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:48:17,354 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:17,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 17:48:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:48:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-12-06 17:48:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 17:48:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-12-06 17:48:17,361 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 51 [2021-12-06 17:48:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:17,361 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-12-06 17:48:17,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 17:48:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-12-06 17:48:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:48:17,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:17,363 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:17,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:17,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:17,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2021-12-06 17:48:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656422687] [2021-12-06 17:48:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:17,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:17,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:48:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:48:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:48:18,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:48:24,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656422687] [2021-12-06 17:48:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656422687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:24,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:48:24,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-12-06 17:48:24,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755997970] [2021-12-06 17:48:24,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:24,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:48:24,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:48:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2021-12-06 17:48:24,038 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 17:48:30,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:48:32,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:48:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:48,019 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2021-12-06 17:48:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:48:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2021-12-06 17:48:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:48,029 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:48:48,029 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:48:48,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=54, Invalid=182, Unknown=4, NotChecked=0, Total=240 [2021-12-06 17:48:48,030 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 201 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 2 Unknown, 29 Unchecked, 7.3s Time] [2021-12-06 17:48:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:48:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-06 17:48:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 17:48:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-12-06 17:48:48,039 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 52 [2021-12-06 17:48:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:48,039 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-12-06 17:48:48,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 17:48:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-12-06 17:48:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:48:48,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:48,040 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:48,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:48,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:48,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1397226472, now seen corresponding path program 1 times [2021-12-06 17:48:48,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:48,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792613703] [2021-12-06 17:48:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:48,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:48,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:48,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:48:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:48:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 17:48:48,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:48,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792613703] [2021-12-06 17:48:48,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792613703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:48,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:48,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:48,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643893523] [2021-12-06 17:48:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:48,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:48,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:48,464 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:48:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:48,671 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2021-12-06 17:48:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2021-12-06 17:48:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:48,673 INFO L225 Difference]: With dead ends: 89 [2021-12-06 17:48:48,673 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 17:48:48,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:48,674 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:48,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 17:48:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-06 17:48:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 17:48:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-12-06 17:48:48,683 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 54 [2021-12-06 17:48:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:48,684 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-12-06 17:48:48,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:48:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-12-06 17:48:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 17:48:48,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:48,685 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:48,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 17:48:48,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:48,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -144627113, now seen corresponding path program 1 times [2021-12-06 17:48:48,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708251188] [2021-12-06 17:48:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:48,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:48,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:48,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:48,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:48:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:48:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 17:48:49,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:49,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708251188] [2021-12-06 17:48:49,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708251188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:49,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:49,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:48:49,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770072996] [2021-12-06 17:48:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:49,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:49,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:49,127 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 17:48:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:49,987 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2021-12-06 17:48:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 57 [2021-12-06 17:48:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:49,988 INFO L225 Difference]: With dead ends: 74 [2021-12-06 17:48:49,988 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 17:48:49,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:49,989 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 151 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:48:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 17:48:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 17:48:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 17:48:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2021-12-06 17:48:49,996 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 57 [2021-12-06 17:48:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,997 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2021-12-06 17:48:49,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 17:48:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2021-12-06 17:48:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:48:49,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,998 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 17:48:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:50,199 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2021-12-06 17:48:50,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066872787] [2021-12-06 17:48:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:50,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 17:48:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:48:50,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:52,397 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~p~0#1_21| (_ BitVec 64))) (= |c_ULTIMATE.start_main_~p~0#1| (bvmul (_ bv2 64) |v_ULTIMATE.start_main_~p~0#1_21|))) is different from true [2021-12-06 17:48:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 17:48:52,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:48:52,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:48:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066872787] [2021-12-06 17:48:52,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066872787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:52,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:52,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:52,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713376760] [2021-12-06 17:48:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:52,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:52,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:48:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=2, Unknown=1, NotChecked=0, Total=6 [2021-12-06 17:48:52,476 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 17:48:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:52,480 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2021-12-06 17:48:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:52,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2021-12-06 17:48:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:52,481 INFO L225 Difference]: With dead ends: 67 [2021-12-06 17:48:52,481 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 17:48:52,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3, Invalid=2, Unknown=1, NotChecked=0, Total=6 [2021-12-06 17:48:52,482 INFO L933 BasicCegarLoop]: 47 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, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:52,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-06 17:48:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 17:48:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 17:48:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 17:48:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-12-06 17:48:52,488 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 69 [2021-12-06 17:48:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:52,488 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-12-06 17:48:52,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 17:48:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-12-06 17:48:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:48:52,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:52,489 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:52,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 17:48:52,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:48:52,691 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2021-12-06 17:48:52,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:48:52,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247160924] [2021-12-06 17:48:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:52,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:48:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:48:52,697 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:48:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_001ed957-97f9-4985-93cc-3e3d41afe314/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 17:48:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:48:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 17:48:54,560 INFO L328 TraceCheckSpWp]: Computing backward predicates...