./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 922bb6facca523b8e3d5998565ece8e6b63ec45d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 922bb6facca523b8e3d5998565ece8e6b63ec45d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:10:17,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:10:17,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:10:17,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:10:17,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:10:17,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:10:17,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:10:17,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:10:17,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:10:17,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:10:17,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:10:17,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:10:17,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:10:17,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:10:17,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:10:17,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:10:17,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:10:17,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:10:17,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:10:17,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:10:17,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:10:17,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:10:17,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:10:17,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:10:17,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:10:17,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:10:17,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:10:17,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:10:17,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:10:17,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:10:17,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:10:17,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:10:17,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:10:17,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:10:17,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:10:17,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:10:17,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:10:17,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:10:17,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:10:17,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:10:17,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:10:17,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 01:10:17,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:10:17,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:10:17,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:10:17,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:10:17,481 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:10:17,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:10:17,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:10:17,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 01:10:17,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:10:17,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:10:17,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:10:17,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:10:17,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:10:17,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:10:17,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:10:17,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:10:17,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:10:17,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:10:17,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:10:17,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:10:17,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:10:17,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:10:17,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:10:17,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:10:17,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 01:10:17,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 01:10:17,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:10:17,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:10:17,488 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 922bb6facca523b8e3d5998565ece8e6b63ec45d [2020-12-03 01:10:17,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:10:17,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:10:17,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:10:17,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:10:17,981 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:10:17,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-03 01:10:18,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bb72984/942007f632884626a62a99ebe249b331/FLAG4928a45c2 [2020-12-03 01:10:18,675 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:10:18,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-03 01:10:18,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bb72984/942007f632884626a62a99ebe249b331/FLAG4928a45c2 [2020-12-03 01:10:19,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bb72984/942007f632884626a62a99ebe249b331 [2020-12-03 01:10:19,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:10:19,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:10:19,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:10:19,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:10:19,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:10:19,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b58500a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19, skipping insertion in model container [2020-12-03 01:10:19,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:10:19,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:10:19,238 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2020-12-03 01:10:19,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:10:19,272 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:10:19,286 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2020-12-03 01:10:19,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:10:19,312 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:10:19,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19 WrapperNode [2020-12-03 01:10:19,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:10:19,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:10:19,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:10:19,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:10:19,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:10:19,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:10:19,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:10:19,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:10:19,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... [2020-12-03 01:10:19,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:10:19,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:10:19,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:10:19,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:10:19,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:10:19,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 01:10:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:10:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:10:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:10:19,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:10:19,784 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:10:19,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:10:19 BoogieIcfgContainer [2020-12-03 01:10:19,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:10:19,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:10:19,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:10:19,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:10:19,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:10:19" (1/3) ... [2020-12-03 01:10:19,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f09f22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:10:19, skipping insertion in model container [2020-12-03 01:10:19,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:19" (2/3) ... [2020-12-03 01:10:19,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f09f22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:10:19, skipping insertion in model container [2020-12-03 01:10:19,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:10:19" (3/3) ... [2020-12-03 01:10:19,804 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.c [2020-12-03 01:10:19,820 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:10:19,824 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:10:19,838 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:10:19,873 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:10:19,874 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:10:19,874 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:10:19,874 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:10:19,874 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:10:19,875 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:10:19,875 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:10:19,875 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:10:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:10:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:10:19,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:19,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:19,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:10:19,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:19,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092291241] [2020-12-03 01:10:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:20,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092291241] [2020-12-03 01:10:20,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:20,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:10:20,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503897797] [2020-12-03 01:10:20,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:10:20,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:10:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:10:20,189 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:10:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:20,228 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:10:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:10:20,232 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:10:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:20,262 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:10:20,262 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:10:20,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:10:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:10:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:10:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:10:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:10:20,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:10:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:20,332 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:10:20,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:10:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:10:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:10:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:20,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:20,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 01:10:20,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:10:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675766430] [2020-12-03 01:10:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:20,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675766430] [2020-12-03 01:10:20,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:20,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:10:20,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883135574] [2020-12-03 01:10:20,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:10:20,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:10:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:10:20,524 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:10:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:20,622 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-03 01:10:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:10:20,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:10:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:20,624 INFO L225 Difference]: With dead ends: 61 [2020-12-03 01:10:20,624 INFO L226 Difference]: Without dead ends: 59 [2020-12-03 01:10:20,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:10:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-03 01:10:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-03 01:10:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:10:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:10:20,634 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:10:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:20,634 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:10:20,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:10:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:10:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:10:20,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:20,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:20,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 01:10:20,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:10:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:20,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195288033] [2020-12-03 01:10:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:20,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195288033] [2020-12-03 01:10:20,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:20,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:10:20,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665615359] [2020-12-03 01:10:20,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:10:20,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:10:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:10:20,702 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:10:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:20,738 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:10:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:10:20,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:10:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:20,740 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:10:20,741 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:10:20,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:10:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:10:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:10:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:10:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:10:20,755 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:10:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:20,755 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:10:20,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:10:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:10:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:10:20,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:20,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:20,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 01:10:20,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:10:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225008056] [2020-12-03 01:10:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:20,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225008056] [2020-12-03 01:10:20,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:20,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:10:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534597800] [2020-12-03 01:10:20,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:10:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:10:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:10:20,852 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:10:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:20,939 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:10:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:10:20,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:10:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:20,941 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:10:20,941 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:10:20,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:10:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:10:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:10:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:10:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:10:20,950 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:10:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:20,950 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:10:20,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:10:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:10:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:10:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:20,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:20,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 01:10:20,952 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:10:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:20,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934074541] [2020-12-03 01:10:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:20,983 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:20,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802258749] [2020-12-03 01:10:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 01:10:21,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934074541] [2020-12-03 01:10:21,267 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:21,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802258749] [2020-12-03 01:10:21,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:21,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-03 01:10:21,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956916494] [2020-12-03 01:10:21,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:10:21,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:10:21,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:21,274 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-03 01:10:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:21,514 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:10:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:10:21,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-03 01:10:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:21,519 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:10:21,519 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:10:21,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:10:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:10:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:10:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:10:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:10:21,548 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:10:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:21,549 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:10:21,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:10:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:10:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:10:21,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:21,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:21,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:21,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:10:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:21,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820135893] [2020-12-03 01:10:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:21,782 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791415024] [2020-12-03 01:10:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:10:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820135893] [2020-12-03 01:10:21,966 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791415024] [2020-12-03 01:10:21,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:21,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 01:10:21,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440904403] [2020-12-03 01:10:21,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:10:21,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:10:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:10:21,968 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 7 states. [2020-12-03 01:10:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:22,239 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-03 01:10:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:10:22,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-03 01:10:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:22,241 INFO L225 Difference]: With dead ends: 53 [2020-12-03 01:10:22,241 INFO L226 Difference]: Without dead ends: 41 [2020-12-03 01:10:22,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:10:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-03 01:10:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-03 01:10:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-03 01:10:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-03 01:10:22,247 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 16 [2020-12-03 01:10:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:22,248 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-03 01:10:22,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:10:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-03 01:10:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 01:10:22,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:22,253 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:22,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:22,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1571159167, now seen corresponding path program 1 times [2020-12-03 01:10:22,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:22,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713762809] [2020-12-03 01:10:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:22,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:22,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885360334] [2020-12-03 01:10:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:10:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:22,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713762809] [2020-12-03 01:10:22,593 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:22,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885360334] [2020-12-03 01:10:22,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:22,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-03 01:10:22,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218727943] [2020-12-03 01:10:22,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 01:10:22,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 01:10:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:10:22,596 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-12-03 01:10:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:22,621 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-03 01:10:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:10:22,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-03 01:10:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:22,623 INFO L225 Difference]: With dead ends: 62 [2020-12-03 01:10:22,623 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 01:10:22,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 01:10:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-03 01:10:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-03 01:10:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-03 01:10:22,630 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 18 [2020-12-03 01:10:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:22,630 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-03 01:10:22,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 01:10:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-03 01:10:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:10:22,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:22,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:22,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:22,848 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:10:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:22,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935895763] [2020-12-03 01:10:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:22,862 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:22,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270299890] [2020-12-03 01:10:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:23,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-03 01:10:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:23,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935895763] [2020-12-03 01:10:23,182 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:23,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270299890] [2020-12-03 01:10:23,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:23,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-03 01:10:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177531295] [2020-12-03 01:10:23,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:10:23,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:10:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:10:23,184 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-03 01:10:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:23,593 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-03 01:10:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 01:10:23,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:10:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:23,594 INFO L225 Difference]: With dead ends: 83 [2020-12-03 01:10:23,595 INFO L226 Difference]: Without dead ends: 71 [2020-12-03 01:10:23,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:10:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-03 01:10:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-03 01:10:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-03 01:10:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-03 01:10:23,603 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-03 01:10:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:23,604 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-03 01:10:23,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:10:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-03 01:10:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 01:10:23,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:23,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:23,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:23,806 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1958905870, now seen corresponding path program 1 times [2020-12-03 01:10:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072655284] [2020-12-03 01:10:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:23,819 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:23,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440737610] [2020-12-03 01:10:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:10:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:24,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072655284] [2020-12-03 01:10:24,049 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:24,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440737610] [2020-12-03 01:10:24,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:24,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-03 01:10:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672917651] [2020-12-03 01:10:24,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:10:24,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:10:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:10:24,053 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-12-03 01:10:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:24,323 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-03 01:10:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:10:24,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-03 01:10:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:24,325 INFO L225 Difference]: With dead ends: 74 [2020-12-03 01:10:24,326 INFO L226 Difference]: Without dead ends: 70 [2020-12-03 01:10:24,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:10:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-03 01:10:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-03 01:10:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:10:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-12-03 01:10:24,336 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 24 [2020-12-03 01:10:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:24,336 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-12-03 01:10:24,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:10:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-12-03 01:10:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:10:24,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:24,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:24,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:24,554 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:10:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:24,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828004223] [2020-12-03 01:10:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:24,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:24,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918157254] [2020-12-03 01:10:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:10:24,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:24,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828004223] [2020-12-03 01:10:24,674 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:24,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918157254] [2020-12-03 01:10:24,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:24,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:10:24,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031359495] [2020-12-03 01:10:24,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:10:24,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:10:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:24,676 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-12-03 01:10:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:24,698 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-03 01:10:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:10:24,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-03 01:10:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:24,699 INFO L225 Difference]: With dead ends: 71 [2020-12-03 01:10:24,699 INFO L226 Difference]: Without dead ends: 65 [2020-12-03 01:10:24,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-03 01:10:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-03 01:10:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:10:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-03 01:10:24,707 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 27 [2020-12-03 01:10:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:24,707 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-03 01:10:24,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:10:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-03 01:10:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:10:24,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:24,708 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:24,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:24,923 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1875627766, now seen corresponding path program 1 times [2020-12-03 01:10:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:24,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743519887] [2020-12-03 01:10:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:24,934 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:24,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442767247] [2020-12-03 01:10:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:10:24,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:25,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743519887] [2020-12-03 01:10:25,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:25,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442767247] [2020-12-03 01:10:25,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:25,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:10:25,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619192339] [2020-12-03 01:10:25,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:10:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:10:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:25,035 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 6 states. [2020-12-03 01:10:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:25,069 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-03 01:10:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:10:25,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-03 01:10:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:25,070 INFO L225 Difference]: With dead ends: 94 [2020-12-03 01:10:25,070 INFO L226 Difference]: Without dead ends: 66 [2020-12-03 01:10:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:10:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-03 01:10:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-03 01:10:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-03 01:10:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-12-03 01:10:25,077 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 28 [2020-12-03 01:10:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:25,078 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-12-03 01:10:25,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:10:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-12-03 01:10:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:10:25,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:25,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:25,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:25,291 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:25,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1711245194, now seen corresponding path program 2 times [2020-12-03 01:10:25,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:25,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399684221] [2020-12-03 01:10:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:25,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:25,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396884665] [2020-12-03 01:10:25,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:25,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-03 01:10:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 01:10:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-03 01:10:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:25,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399684221] [2020-12-03 01:10:25,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:25,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396884665] [2020-12-03 01:10:25,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:25,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-03 01:10:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998591172] [2020-12-03 01:10:25,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 01:10:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 01:10:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-03 01:10:25,908 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 11 states. [2020-12-03 01:10:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:26,758 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-12-03 01:10:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 01:10:26,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-03 01:10:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:26,760 INFO L225 Difference]: With dead ends: 103 [2020-12-03 01:10:26,760 INFO L226 Difference]: Without dead ends: 93 [2020-12-03 01:10:26,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-03 01:10:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-03 01:10:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-12-03 01:10:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-03 01:10:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-03 01:10:26,768 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 28 [2020-12-03 01:10:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:26,769 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-03 01:10:26,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 01:10:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-03 01:10:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:10:26,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:26,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:26,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-03 01:10:26,971 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:10:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:26,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532849777] [2020-12-03 01:10:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:26,985 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:26,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290420171] [2020-12-03 01:10:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:31,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-03 01:10:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:31,679 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:31,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 01:10:31,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-03 01:10:31,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 01:10:32,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-03 01:10:32,634 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:34,197 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:35,928 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:37,698 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:39,461 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:40,423 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:41,341 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:42,324 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:43,774 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:44,999 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:45,963 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:47,045 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:47,888 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:51,422 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:55,682 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:00,429 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:07,177 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:18,702 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:36,952 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:39,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532849777] [2020-12-03 01:11:39,748 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:39,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290420171] [2020-12-03 01:11:39,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-03 01:11:39,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:39,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-03 01:11:39,749 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-03 01:11:39,750 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:11:39,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:39,975 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-03 01:11:39,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:11:39 BoogieIcfgContainer [2020-12-03 01:11:39,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:11:39,976 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:11:39,976 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:11:39,976 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:11:39,977 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:10:19" (3/4) ... [2020-12-03 01:11:39,981 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 01:11:39,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:11:39,996 INFO L168 Benchmark]: Toolchain (without parser) took 80957.64 ms. Allocated memory was 46.1 MB in the beginning and 218.1 MB in the end (delta: 172.0 MB). Free memory was 22.9 MB in the beginning and 149.7 MB in the end (delta: -126.8 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:39,997 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 24.0 MB in the end (delta: 33.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:40,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.84 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.8 MB in the beginning and 32.4 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:40,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 56.6 MB. Free memory was 32.4 MB in the beginning and 30.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:40,003 INFO L168 Benchmark]: Boogie Preprocessor took 27.89 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 29.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:40,003 INFO L168 Benchmark]: RCFGBuilder took 398.65 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 26.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:40,004 INFO L168 Benchmark]: TraceAbstraction took 80180.30 ms. Allocated memory was 56.6 MB in the beginning and 218.1 MB in the end (delta: 161.5 MB). Free memory was 39.5 MB in the beginning and 149.7 MB in the end (delta: -110.2 MB). Peak memory consumption was 133.4 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:40,008 INFO L168 Benchmark]: Witness Printer took 5.30 ms. Allocated memory is still 218.1 MB. Free memory is still 149.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:40,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 24.0 MB in the end (delta: 33.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.84 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.8 MB in the beginning and 32.4 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.81 ms. Allocated memory is still 56.6 MB. Free memory was 32.4 MB in the beginning and 30.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.89 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 29.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 398.65 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 26.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 80180.30 ms. Allocated memory was 56.6 MB in the beginning and 218.1 MB in the end (delta: 161.5 MB). Free memory was 39.5 MB in the beginning and 149.7 MB in the end (delta: -110.2 MB). Peak memory consumption was 133.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.30 ms. Allocated memory is still 218.1 MB. Free memory is still 149.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<10 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 80.0s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 783 SDslu, 796 SDs, 0 SdLazy, 633 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 30603 SizeOfPredicates, 44 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/59 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:11:42,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:11:42,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:11:42,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:11:42,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:11:42,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:11:42,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:11:42,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:11:42,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:11:42,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:11:42,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:11:42,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:11:42,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:11:42,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:11:42,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:11:42,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:11:42,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:11:42,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:11:42,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:11:42,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:11:42,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:11:42,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:11:42,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:11:42,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:11:42,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:11:42,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:11:42,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:11:42,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:11:42,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:11:42,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:11:42,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:11:42,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:11:42,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:11:42,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:11:42,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:11:42,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:11:42,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:11:42,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:11:42,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:11:42,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:11:42,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:11:42,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 01:11:42,564 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:11:42,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:11:42,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:11:42,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:11:42,567 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:11:42,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:11:42,568 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:11:42,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:11:42,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:11:42,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:11:42,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:11:42,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:11:42,570 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 01:11:42,570 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 01:11:42,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:11:42,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:11:42,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:11:42,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:11:42,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:11:42,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:11:42,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:11:42,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:11:42,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:11:42,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:11:42,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:11:42,574 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 01:11:42,574 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 01:11:42,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:11:42,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:11:42,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 01:11:42,575 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 922bb6facca523b8e3d5998565ece8e6b63ec45d [2020-12-03 01:11:42,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:11:43,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:11:43,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:11:43,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:11:43,050 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:11:43,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-03 01:11:43,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86d3052bf/5cf3964a83e84c70aea6036889fb4346/FLAG703f427dd [2020-12-03 01:11:43,737 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:11:43,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-03 01:11:43,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86d3052bf/5cf3964a83e84c70aea6036889fb4346/FLAG703f427dd [2020-12-03 01:11:44,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86d3052bf/5cf3964a83e84c70aea6036889fb4346 [2020-12-03 01:11:44,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:11:44,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:11:44,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:11:44,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:11:44,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:11:44,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f8bca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44, skipping insertion in model container [2020-12-03 01:11:44,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:11:44,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:11:44,362 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2020-12-03 01:11:44,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:11:44,402 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:11:44,417 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2020-12-03 01:11:44,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:11:44,445 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:11:44,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44 WrapperNode [2020-12-03 01:11:44,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:11:44,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:11:44,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:11:44,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:11:44,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:11:44,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:11:44,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:11:44,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:11:44,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... [2020-12-03 01:11:44,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:11:44,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:11:44,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:11:44,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:11:44,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:11:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 01:11:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:11:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:11:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:11:45,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:11:45,125 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:11:45,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:45 BoogieIcfgContainer [2020-12-03 01:11:45,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:11:45,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:11:45,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:11:45,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:11:45,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:11:44" (1/3) ... [2020-12-03 01:11:45,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac120d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:45, skipping insertion in model container [2020-12-03 01:11:45,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:44" (2/3) ... [2020-12-03 01:11:45,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac120d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:45, skipping insertion in model container [2020-12-03 01:11:45,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:45" (3/3) ... [2020-12-03 01:11:45,137 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.c [2020-12-03 01:11:45,153 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:11:45,157 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:11:45,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:11:45,209 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:11:45,210 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:11:45,210 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:11:45,210 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:11:45,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:11:45,219 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:11:45,219 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:11:45,219 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:11:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:11:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:11:45,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:45,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:45,252 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:11:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:45,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620095109] [2020-12-03 01:11:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:45,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 01:11:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:45,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:45,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620095109] [2020-12-03 01:11:45,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:45,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:11:45,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135960747] [2020-12-03 01:11:45,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:11:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:11:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:11:45,547 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:11:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:45,585 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:11:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:11:45,587 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:11:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:45,601 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:11:45,602 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:11:45,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:11:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:11:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:11:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:11:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:11:45,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:11:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:45,656 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:11:45,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:11:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:11:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:11:45,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:45,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:45,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 01:11:45,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:11:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:45,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687818224] [2020-12-03 01:11:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:11:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:46,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:46,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687818224] [2020-12-03 01:11:46,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:46,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294699569] [2020-12-03 01:11:46,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:46,007 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:11:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:46,150 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:11:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:46,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:11:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:46,154 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:11:46,154 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:11:46,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:11:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:11:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:11:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:11:46,164 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:11:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:46,164 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:11:46,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:11:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:11:46,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:46,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:46,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 01:11:46,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:11:46,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:46,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126359710] [2020-12-03 01:11:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 01:11:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:46,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:46,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126359710] [2020-12-03 01:11:46,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:46,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:11:46,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184361517] [2020-12-03 01:11:46,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:46,501 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:11:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:46,525 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:11:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:46,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:11:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:46,527 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:11:46,528 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:11:46,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:11:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:11:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:11:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:11:46,540 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:11:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:46,540 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:11:46,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:11:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:11:46,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:46,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:46,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 01:11:46,756 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:11:46,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:46,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134724508] [2020-12-03 01:11:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:11:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:46,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:46,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134724508] [2020-12-03 01:11:46,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:46,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231476267] [2020-12-03 01:11:46,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:46,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:46,837 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:11:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:46,995 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:11:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:46,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:11:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:46,997 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:11:46,998 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:11:46,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:11:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:11:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:11:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:11:47,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:11:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:47,008 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:11:47,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:11:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:11:47,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:47,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:47,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 01:11:47,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:11:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744217237] [2020-12-03 01:11:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:47,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:47,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744217237] [2020-12-03 01:11:47,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:47,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:47,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207528954] [2020-12-03 01:11:47,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:47,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:47,337 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:11:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:47,581 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:11:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:11:47,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-03 01:11:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:47,583 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:11:47,583 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:11:47,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:11:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:11:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:11:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:11:47,594 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:11:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:47,595 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:11:47,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:11:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:11:47,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:47,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:47,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 01:11:47,811 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:11:47,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:47,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961253279] [2020-12-03 01:11:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:47,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961253279] [2020-12-03 01:11:47,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:47,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:47,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673161919] [2020-12-03 01:11:47,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:47,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:47,967 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 4 states. [2020-12-03 01:11:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:48,149 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-03 01:11:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:48,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-03 01:11:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:48,151 INFO L225 Difference]: With dead ends: 68 [2020-12-03 01:11:48,151 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 01:11:48,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 01:11:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-12-03 01:11:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 01:11:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-03 01:11:48,160 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2020-12-03 01:11:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:48,161 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-03 01:11:48,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-03 01:11:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:11:48,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:48,162 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:48,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 01:11:48,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1944686052, now seen corresponding path program 1 times [2020-12-03 01:11:48,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:48,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773077326] [2020-12-03 01:11:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:48,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:48,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773077326] [2020-12-03 01:11:48,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:48,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-03 01:11:48,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715247329] [2020-12-03 01:11:48,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:11:48,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:48,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:11:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:11:48,620 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 8 states. [2020-12-03 01:11:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:48,745 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-12-03 01:11:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 01:11:48,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:11:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:48,747 INFO L225 Difference]: With dead ends: 117 [2020-12-03 01:11:48,747 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 01:11:48,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:11:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 01:11:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2020-12-03 01:11:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-03 01:11:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-12-03 01:11:48,759 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 20 [2020-12-03 01:11:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:48,760 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-12-03 01:11:48,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:11:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-12-03 01:11:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:11:48,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:48,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:48,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 01:11:48,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:11:48,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:48,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71392986] [2020-12-03 01:11:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:11:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:49,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:49,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71392986] [2020-12-03 01:11:49,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:49,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:11:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397127843] [2020-12-03 01:11:49,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:11:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:11:49,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:11:49,364 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 8 states. [2020-12-03 01:11:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:52,800 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-12-03 01:11:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 01:11:52,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:11:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:52,802 INFO L225 Difference]: With dead ends: 140 [2020-12-03 01:11:52,802 INFO L226 Difference]: Without dead ends: 126 [2020-12-03 01:11:52,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-03 01:11:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-03 01:11:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-12-03 01:11:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-03 01:11:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-12-03 01:11:52,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 20 [2020-12-03 01:11:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-12-03 01:11:52,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:11:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-12-03 01:11:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:11:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:52,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:53,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 01:11:53,050 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:11:53,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:53,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178256761] [2020-12-03 01:11:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:11:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:53,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:53,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178256761] [2020-12-03 01:11:53,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:53,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-03 01:11:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606579026] [2020-12-03 01:11:53,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 01:11:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 01:11:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:11:53,305 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 10 states. [2020-12-03 01:11:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:53,648 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-12-03 01:11:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 01:11:53,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-03 01:11:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:53,651 INFO L225 Difference]: With dead ends: 178 [2020-12-03 01:11:53,651 INFO L226 Difference]: Without dead ends: 168 [2020-12-03 01:11:53,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-03 01:11:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-03 01:11:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 139. [2020-12-03 01:11:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-03 01:11:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2020-12-03 01:11:53,717 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 27 [2020-12-03 01:11:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:53,717 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2020-12-03 01:11:53,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 01:11:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2020-12-03 01:11:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:11:53,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:53,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 01:11:53,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:11:53,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339091421] [2020-12-03 01:11:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:11:54,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:54,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:11:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:54,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:55,295 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-03 01:11:55,746 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:11:56,296 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 01:11:57,045 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-03 01:11:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:57,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339091421] [2020-12-03 01:11:57,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:57,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-03 01:11:57,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749645764] [2020-12-03 01:11:57,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 01:11:57,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:57,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 01:11:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:11:57,107 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand 14 states. [2020-12-03 01:11:59,025 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:12:00,425 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:12:01,004 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:04,258 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:12:06,353 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:06,950 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:12:07,707 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:08,341 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-03 01:12:11,632 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:12:12,168 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:12:15,779 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:12:17,052 WARN L197 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-03 01:12:20,365 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:12:24,778 WARN L197 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:12:33,233 WARN L197 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-03 01:12:34,924 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:12:35,531 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 01:12:36,804 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:12:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:37,515 INFO L93 Difference]: Finished difference Result 285 states and 346 transitions. [2020-12-03 01:12:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-03 01:12:37,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-12-03 01:12:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:37,521 INFO L225 Difference]: With dead ends: 285 [2020-12-03 01:12:37,522 INFO L226 Difference]: Without dead ends: 232 [2020-12-03 01:12:37,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2020-12-03 01:12:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-03 01:12:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 150. [2020-12-03 01:12:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-03 01:12:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2020-12-03 01:12:37,548 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 31 [2020-12-03 01:12:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:37,549 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2020-12-03 01:12:37,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 01:12:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2020-12-03 01:12:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 01:12:37,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:37,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:37,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-03 01:12:37,752 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash -900022411, now seen corresponding path program 1 times [2020-12-03 01:12:37,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:37,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368686394] [2020-12-03 01:12:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:12:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:38,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:12:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:38,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:38,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368686394] [2020-12-03 01:12:38,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:38,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-03 01:12:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613353596] [2020-12-03 01:12:38,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 01:12:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 01:12:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:12:38,858 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 12 states. [2020-12-03 01:12:39,531 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-03 01:12:39,939 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-03 01:12:40,339 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:12:41,279 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:12:44,340 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:12:44,751 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:12:45,887 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:12:46,724 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:12:47,203 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:12:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:47,707 INFO L93 Difference]: Finished difference Result 223 states and 274 transitions. [2020-12-03 01:12:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-03 01:12:47,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-03 01:12:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:47,712 INFO L225 Difference]: With dead ends: 223 [2020-12-03 01:12:47,712 INFO L226 Difference]: Without dead ends: 172 [2020-12-03 01:12:47,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 01:12:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-03 01:12:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2020-12-03 01:12:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-03 01:12:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 174 transitions. [2020-12-03 01:12:47,734 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 174 transitions. Word has length 33 [2020-12-03 01:12:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:47,734 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 174 transitions. [2020-12-03 01:12:47,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 01:12:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 174 transitions. [2020-12-03 01:12:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-03 01:12:47,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:47,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:47,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-03 01:12:47,950 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 918142130, now seen corresponding path program 1 times [2020-12-03 01:12:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:47,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740307932] [2020-12-03 01:12:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:12:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:48,516 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:12:48,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:12:49,389 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:12:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:49,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:50,359 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:50,359 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:12:51,440 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 01:12:51,458 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:51,458 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:12:59,030 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:12:59,039 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:59,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:13:02,210 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:02,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740307932] [2020-12-03 01:13:02,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:02,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-03 01:13:02,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030305353] [2020-12-03 01:13:02,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-03 01:13:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-03 01:13:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=304, Unknown=3, NotChecked=0, Total=380 [2020-12-03 01:13:02,251 INFO L87 Difference]: Start difference. First operand 150 states and 174 transitions. Second operand 20 states. [2020-12-03 01:13:04,882 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-12-03 01:13:07,321 WARN L197 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-12-03 01:13:20,416 WARN L197 SmtUtils]: Spent 12.72 s on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-12-03 01:13:28,909 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-03 01:13:30,691 WARN L197 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:13:32,015 WARN L197 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-03 01:13:34,246 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:13:35,304 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:13:39,237 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 01:13:42,096 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 01:13:42,749 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:13:47,650 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:13:48,382 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:48,383 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-12-03 01:13:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 01:13:48,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-12-03 01:13:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:48,384 INFO L225 Difference]: With dead ends: 164 [2020-12-03 01:13:48,384 INFO L226 Difference]: Without dead ends: 147 [2020-12-03 01:13:48,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=302, Invalid=1026, Unknown=4, NotChecked=0, Total=1332 [2020-12-03 01:13:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-03 01:13:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2020-12-03 01:13:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-03 01:13:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2020-12-03 01:13:48,403 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 36 [2020-12-03 01:13:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:48,403 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2020-12-03 01:13:48,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-03 01:13:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2020-12-03 01:13:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-03 01:13:48,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:48,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:48,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-03 01:13:48,620 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash -68445756, now seen corresponding path program 2 times [2020-12-03 01:13:48,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:48,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427760286] [2020-12-03 01:13:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-03 01:13:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:13:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:48,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:13:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:48,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427760286] [2020-12-03 01:13:48,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:48,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:13:48,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529653316] [2020-12-03 01:13:48,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:13:48,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:13:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:13:48,951 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand 8 states. [2020-12-03 01:13:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:49,221 INFO L93 Difference]: Finished difference Result 237 states and 278 transitions. [2020-12-03 01:13:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:13:49,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-03 01:13:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:49,223 INFO L225 Difference]: With dead ends: 237 [2020-12-03 01:13:49,224 INFO L226 Difference]: Without dead ends: 200 [2020-12-03 01:13:49,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-03 01:13:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-03 01:13:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 162. [2020-12-03 01:13:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-03 01:13:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-12-03 01:13:49,246 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 44 [2020-12-03 01:13:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:49,247 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-12-03 01:13:49,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:13:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-12-03 01:13:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-03 01:13:49,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:49,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:49,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-03 01:13:49,462 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1302416352, now seen corresponding path program 2 times [2020-12-03 01:13:49,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:49,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209813498] [2020-12-03 01:13:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-03 01:13:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:13:50,031 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:13:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:13:50,309 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:13:50,391 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-03 01:13:50,392 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:13:50,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-03 01:13:50,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:13:50 BoogieIcfgContainer [2020-12-03 01:13:50,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:13:50,698 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:13:50,699 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:13:50,699 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:13:50,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:45" (3/4) ... [2020-12-03 01:13:50,702 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 01:13:50,806 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 01:13:50,807 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:13:50,808 INFO L168 Benchmark]: Toolchain (without parser) took 126679.98 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 20.9 MB in the beginning and 39.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,809 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 23.8 MB in the end (delta: 52.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:13:50,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.65 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.7 MB in the beginning and 30.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,812 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.99 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 28.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,812 INFO L168 Benchmark]: Boogie Preprocessor took 40.51 ms. Allocated memory is still 54.5 MB. Free memory was 28.4 MB in the beginning and 27.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,813 INFO L168 Benchmark]: RCFGBuilder took 593.68 ms. Allocated memory is still 54.5 MB. Free memory was 27.0 MB in the beginning and 25.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,814 INFO L168 Benchmark]: TraceAbstraction took 125568.58 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 24.6 MB in the beginning and 44.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,818 INFO L168 Benchmark]: Witness Printer took 108.56 ms. Allocated memory is still 67.1 MB. Free memory was 43.4 MB in the beginning and 39.8 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:50,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 23.8 MB in the end (delta: 52.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.65 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.7 MB in the beginning and 30.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.99 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 28.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.51 ms. Allocated memory is still 54.5 MB. Free memory was 28.4 MB in the beginning and 27.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 593.68 ms. Allocated memory is still 54.5 MB. Free memory was 27.0 MB in the beginning and 25.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125568.58 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 24.6 MB in the beginning and 44.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.1 GB. * Witness Printer took 108.56 ms. Allocated memory is still 67.1 MB. Free memory was 43.4 MB in the beginning and 39.8 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) VAL [counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=2] [L35] EXPR counter++ VAL [counter=3] [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND TRUE !(r >= d) VAL [counter=3] [L45] EXPR counter++ VAL [counter=4] [L45] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [counter=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [counter=4] [L45] EXPR counter++ VAL [counter=5] [L45] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [counter=5] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [counter=5] [L45] EXPR counter++ VAL [counter=6] [L45] COND TRUE counter++<10 [L15] COND TRUE !(cond) VAL [counter=6] [L17] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 125.3s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 100.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 892 SDslu, 1334 SDs, 0 SdLazy, 1039 SolverSat, 416 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 42.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 73.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=13, 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, 13 MinimizatonAttempts, 309 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 466 ConstructedInterpolants, 26 QuantifiedInterpolants, 104034 SizeOfPredicates, 57 NumberOfNonLiveVariables, 796 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 22/170 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 proved your program to be incorrect! Received shutdown request...