./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 943a72d31eebdcd925e39756b65615d2a6fd2676 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:03:00,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:03:00,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:03:00,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:03:00,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:03:00,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:03:00,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:03:00,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:03:00,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:03:00,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:03:00,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:03:00,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:03:00,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:03:00,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:03:00,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:03:00,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:03:00,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:03:00,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:03:00,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:03:00,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:03:00,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:03:00,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:03:00,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:03:00,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:03:00,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:03:00,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:03:00,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:03:00,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:03:00,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:03:00,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:03:00,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:03:00,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:03:00,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:03:00,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:03:00,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:03:00,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:03:00,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:03:00,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:03:00,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:03:00,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:03:00,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:03:00,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-29 22:03:00,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:03:00,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:03:00,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:03:00,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:03:00,430 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:03:00,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:03:00,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:03:00,430 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:03:00,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:03:00,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:03:00,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:03:00,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:03:00,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:03:00,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:03:00,434 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 22:03:00,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:03:00,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:03:00,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:03:00,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:03:00,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:03:00,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:03:00,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:03:00,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:03:00,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:03:00,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:03:00,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:03:00,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:03:00,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:03:00,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:03:00,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:03:00,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:03:00,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 943a72d31eebdcd925e39756b65615d2a6fd2676 [2020-11-29 22:03:00,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:03:00,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:03:00,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:03:00,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:03:00,788 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:03:00,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/../../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2020-11-29 22:03:00,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/data/e1aa0a96d/cfdbb38f47e14e308e68198d3c137cfa/FLAGae8d50c21 [2020-11-29 22:03:01,384 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:03:01,385 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2020-11-29 22:03:01,391 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/data/e1aa0a96d/cfdbb38f47e14e308e68198d3c137cfa/FLAGae8d50c21 [2020-11-29 22:03:01,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/data/e1aa0a96d/cfdbb38f47e14e308e68198d3c137cfa [2020-11-29 22:03:01,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:03:01,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:03:01,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:03:01,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:03:01,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:03:01,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:03:01" (1/1) ... [2020-11-29 22:03:01,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c0e814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:01, skipping insertion in model container [2020-11-29 22:03:01,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:03:01" (1/1) ... [2020-11-29 22:03:01,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:03:01,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:03:02,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:03:02,029 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:03:02,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:03:02,083 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:03:02,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02 WrapperNode [2020-11-29 22:03:02,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:03:02,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:03:02,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:03:02,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:03:02,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:03:02,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:03:02,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:03:02,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:03:02,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... [2020-11-29 22:03:02,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:03:02,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:03:02,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:03:02,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:03:02,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:02,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:03:02,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:03:02,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:03:02,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:03:02,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:03:02,502 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 22:03:02,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:03:02 BoogieIcfgContainer [2020-11-29 22:03:02,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:03:02,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:03:02,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:03:02,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:03:02,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:03:01" (1/3) ... [2020-11-29 22:03:02,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48079f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:03:02, skipping insertion in model container [2020-11-29 22:03:02,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:03:02" (2/3) ... [2020-11-29 22:03:02,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48079f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:03:02, skipping insertion in model container [2020-11-29 22:03:02,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:03:02" (3/3) ... [2020-11-29 22:03:02,513 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark01_conjunctive.i [2020-11-29 22:03:02,525 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:03:02,530 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 22:03:02,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 22:03:02,569 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:03:02,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:03:02,569 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:03:02,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:03:02,570 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:03:02,570 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:03:02,570 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:03:02,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:03:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-29 22:03:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 22:03:02,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:02,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 22:03:02,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash 28695973, now seen corresponding path program 1 times [2020-11-29 22:03:02,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:02,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771375246] [2020-11-29 22:03:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771375246] [2020-11-29 22:03:02,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:03:02,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:03:02,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996419619] [2020-11-29 22:03:02,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:03:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:03:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:03:02,799 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-11-29 22:03:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:02,971 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-11-29 22:03:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:03:02,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-29 22:03:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:02,985 INFO L225 Difference]: With dead ends: 34 [2020-11-29 22:03:02,985 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 22:03:02,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:03:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 22:03:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-11-29 22:03:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 22:03:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-29 22:03:03,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2020-11-29 22:03:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:03,026 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-29 22:03:03,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:03:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-29 22:03:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 22:03:03,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:03,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 22:03:03,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:03:03,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash 889575213, now seen corresponding path program 1 times [2020-11-29 22:03:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:03,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192282038] [2020-11-29 22:03:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192282038] [2020-11-29 22:03:03,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:03:03,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:03:03,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621234627] [2020-11-29 22:03:03,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:03:03,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:03:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:03:03,156 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2020-11-29 22:03:03,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:03,198 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-29 22:03:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:03:03,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-29 22:03:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:03,200 INFO L225 Difference]: With dead ends: 12 [2020-11-29 22:03:03,200 INFO L226 Difference]: Without dead ends: 11 [2020-11-29 22:03:03,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:03:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-29 22:03:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 22:03:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 22:03:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-29 22:03:03,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2020-11-29 22:03:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:03,204 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-29 22:03:03,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:03:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-29 22:03:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:03:03,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:03,204 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 22:03:03,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:03:03,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 183289263, now seen corresponding path program 1 times [2020-11-29 22:03:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:03,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595858699] [2020-11-29 22:03:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:03,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595858699] [2020-11-29 22:03:03,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588338202] [2020-11-29 22:03:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:03:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:03,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:03,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-11-29 22:03:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763710171] [2020-11-29 22:03:03,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:03:03,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:03:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:03:03,422 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-11-29 22:03:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:03,492 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-29 22:03:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:03:03,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-29 22:03:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:03,494 INFO L225 Difference]: With dead ends: 16 [2020-11-29 22:03:03,494 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 22:03:03,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:03:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 22:03:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-11-29 22:03:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 22:03:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-29 22:03:03,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-11-29 22:03:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:03,499 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-29 22:03:03,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:03:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-29 22:03:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 22:03:03,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:03,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:03:03,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 22:03:03,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:03,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1386999907, now seen corresponding path program 1 times [2020-11-29 22:03:03,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:03,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590985786] [2020-11-29 22:03:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:03,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590985786] [2020-11-29 22:03:03,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965555367] [2020-11-29 22:03:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:03:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:03,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:03:03,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-11-29 22:03:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558350596] [2020-11-29 22:03:03,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:03:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:03:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:03:03,881 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-11-29 22:03:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:03,908 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-11-29 22:03:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:03:03,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-29 22:03:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:03,909 INFO L225 Difference]: With dead ends: 13 [2020-11-29 22:03:03,909 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 22:03:03,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:03:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 22:03:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 22:03:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 22:03:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-29 22:03:03,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-11-29 22:03:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:03,914 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-29 22:03:03,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:03:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-29 22:03:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:03:03,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:03,915 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-11-29 22:03:04,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:04,129 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1467050341, now seen corresponding path program 2 times [2020-11-29 22:03:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:04,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249373084] [2020-11-29 22:03:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:04,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249373084] [2020-11-29 22:03:04,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453420564] [2020-11-29 22:03:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:04,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:03:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:03:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:04,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:04,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-29 22:03:04,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312082911] [2020-11-29 22:03:04,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:03:04,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:03:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:03:04,377 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2020-11-29 22:03:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:04,455 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-29 22:03:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:03:04,457 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 22:03:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:04,457 INFO L225 Difference]: With dead ends: 17 [2020-11-29 22:03:04,458 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 22:03:04,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:03:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 22:03:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-11-29 22:03:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 22:03:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-29 22:03:04,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-11-29 22:03:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-29 22:03:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:03:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-29 22:03:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:03:04,467 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:04,467 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2020-11-29 22:03:04,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:04,668 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash -690445841, now seen corresponding path program 3 times [2020-11-29 22:03:04,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:04,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820399485] [2020-11-29 22:03:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:04,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820399485] [2020-11-29 22:03:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347285062] [2020-11-29 22:03:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:04,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 22:03:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:03:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:05,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:05,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-29 22:03:05,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472573076] [2020-11-29 22:03:05,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:03:05,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:03:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:03:05,036 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-11-29 22:03:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:05,156 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-29 22:03:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:03:05,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 22:03:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:05,158 INFO L225 Difference]: With dead ends: 20 [2020-11-29 22:03:05,158 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 22:03:05,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:03:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 22:03:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-11-29 22:03:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 22:03:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-29 22:03:05,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2020-11-29 22:03:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:05,163 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-29 22:03:05,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:03:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-29 22:03:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:03:05,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:05,168 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2020-11-29 22:03:05,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:05,369 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash -473619163, now seen corresponding path program 4 times [2020-11-29 22:03:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:05,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549935000] [2020-11-29 22:03:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:05,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549935000] [2020-11-29 22:03:05,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248226236] [2020-11-29 22:03:05,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:05,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:03:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:03:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:05,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:05,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-29 22:03:05,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402808318] [2020-11-29 22:03:05,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:03:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:03:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:03:05,661 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2020-11-29 22:03:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:05,740 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-29 22:03:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:03:05,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-11-29 22:03:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:05,741 INFO L225 Difference]: With dead ends: 23 [2020-11-29 22:03:05,741 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 22:03:05,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:03:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 22:03:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-11-29 22:03:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 22:03:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-29 22:03:05,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2020-11-29 22:03:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:05,749 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-29 22:03:05,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:03:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-29 22:03:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:03:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:05,750 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1] [2020-11-29 22:03:05,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 22:03:05,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -620868049, now seen corresponding path program 5 times [2020-11-29 22:03:05,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:05,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987468859] [2020-11-29 22:03:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:06,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987468859] [2020-11-29 22:03:06,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720073468] [2020-11-29 22:03:06,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:06,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 22:03:06,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:03:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:06,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-29 22:03:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135635159] [2020-11-29 22:03:06,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:03:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:03:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:03:06,338 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 14 states. [2020-11-29 22:03:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:06,417 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-11-29 22:03:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:03:06,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-29 22:03:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:06,419 INFO L225 Difference]: With dead ends: 26 [2020-11-29 22:03:06,419 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 22:03:06,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:03:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 22:03:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-29 22:03:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 22:03:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-29 22:03:06,429 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2020-11-29 22:03:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:06,430 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-29 22:03:06,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:03:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-29 22:03:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:03:06,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:06,431 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1] [2020-11-29 22:03:06,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:06,649 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2144145637, now seen corresponding path program 6 times [2020-11-29 22:03:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113128022] [2020-11-29 22:03:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:06,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113128022] [2020-11-29 22:03:06,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110688594] [2020-11-29 22:03:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:06,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 22:03:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:03:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:07,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:07,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-29 22:03:07,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507715400] [2020-11-29 22:03:07,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:03:07,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:03:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:03:07,042 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-11-29 22:03:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:07,134 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-29 22:03:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:03:07,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-11-29 22:03:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:07,136 INFO L225 Difference]: With dead ends: 29 [2020-11-29 22:03:07,136 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 22:03:07,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:03:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 22:03:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-11-29 22:03:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 22:03:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-29 22:03:07,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-11-29 22:03:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:07,142 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-29 22:03:07,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:03:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-29 22:03:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:03:07,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:07,143 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1] [2020-11-29 22:03:07,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:07,344 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1489095279, now seen corresponding path program 7 times [2020-11-29 22:03:07,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:07,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216955307] [2020-11-29 22:03:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:07,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216955307] [2020-11-29 22:03:07,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309779283] [2020-11-29 22:03:07,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:03:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:08,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:08,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-29 22:03:08,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990781738] [2020-11-29 22:03:08,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:03:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:03:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:03:08,031 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-11-29 22:03:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:08,172 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-11-29 22:03:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:03:08,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-11-29 22:03:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:08,173 INFO L225 Difference]: With dead ends: 32 [2020-11-29 22:03:08,173 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 22:03:08,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:03:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 22:03:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-29 22:03:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 22:03:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-11-29 22:03:08,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-11-29 22:03:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:08,183 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-11-29 22:03:08,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:03:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-11-29 22:03:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 22:03:08,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:08,184 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1] [2020-11-29 22:03:08,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 22:03:08,413 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:08,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1079694171, now seen corresponding path program 8 times [2020-11-29 22:03:08,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:08,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031586436] [2020-11-29 22:03:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:08,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031586436] [2020-11-29 22:03:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935403062] [2020-11-29 22:03:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/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 [2020-11-29 22:03:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:03:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:03:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:08,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:08,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-11-29 22:03:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371235295] [2020-11-29 22:03:08,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:03:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:03:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:03:08,852 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 20 states. [2020-11-29 22:03:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:09,029 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-29 22:03:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:03:09,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-11-29 22:03:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:09,033 INFO L225 Difference]: With dead ends: 35 [2020-11-29 22:03:09,033 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 22:03:09,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=254, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:03:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 22:03:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-11-29 22:03:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 22:03:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-29 22:03:09,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2020-11-29 22:03:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:09,040 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-29 22:03:09,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:03:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-29 22:03:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 22:03:09,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:09,048 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1] [2020-11-29 22:03:09,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:09,261 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash -158918993, now seen corresponding path program 9 times [2020-11-29 22:03:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:09,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391926005] [2020-11-29 22:03:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391926005] [2020-11-29 22:03:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851240381] [2020-11-29 22:03:09,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:09,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 22:03:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 22:03:09,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:09,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:09,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-11-29 22:03:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312931020] [2020-11-29 22:03:09,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:03:09,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:03:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:03:09,738 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 22 states. [2020-11-29 22:03:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:09,845 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-29 22:03:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:03:09,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2020-11-29 22:03:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:09,846 INFO L225 Difference]: With dead ends: 38 [2020-11-29 22:03:09,847 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 22:03:09,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:03:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 22:03:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-29 22:03:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 22:03:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-29 22:03:09,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2020-11-29 22:03:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:09,868 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-29 22:03:09,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:03:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-29 22:03:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:03:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:09,870 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1] [2020-11-29 22:03:10,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:10,087 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1301710747, now seen corresponding path program 10 times [2020-11-29 22:03:10,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:10,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000329113] [2020-11-29 22:03:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:10,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000329113] [2020-11-29 22:03:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102304973] [2020-11-29 22:03:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:10,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:03:10,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 22:03:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:11,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:11,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-11-29 22:03:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807487648] [2020-11-29 22:03:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:03:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:03:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:03:11,035 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 24 states. [2020-11-29 22:03:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:11,165 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-11-29 22:03:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:03:11,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-11-29 22:03:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:11,167 INFO L225 Difference]: With dead ends: 41 [2020-11-29 22:03:11,167 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 22:03:11,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:03:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 22:03:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-11-29 22:03:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 22:03:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-29 22:03:11,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2020-11-29 22:03:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:11,174 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-29 22:03:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:03:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-29 22:03:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 22:03:11,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:11,175 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1] [2020-11-29 22:03:11,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 22:03:11,376 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash -5098769, now seen corresponding path program 11 times [2020-11-29 22:03:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258449381] [2020-11-29 22:03:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:11,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258449381] [2020-11-29 22:03:11,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290628276] [2020-11-29 22:03:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:11,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 22:03:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 22:03:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:12,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:12,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-11-29 22:03:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782080937] [2020-11-29 22:03:12,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 22:03:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 22:03:12,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:03:12,450 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 26 states. [2020-11-29 22:03:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:12,583 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-11-29 22:03:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:03:12,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2020-11-29 22:03:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:12,585 INFO L225 Difference]: With dead ends: 44 [2020-11-29 22:03:12,585 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 22:03:12,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=428, Unknown=0, NotChecked=0, Total=702 [2020-11-29 22:03:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 22:03:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-29 22:03:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:03:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-11-29 22:03:12,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2020-11-29 22:03:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:12,593 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-11-29 22:03:12,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 22:03:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-11-29 22:03:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 22:03:12,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:12,594 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1] [2020-11-29 22:03:12,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 22:03:12,795 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1573522395, now seen corresponding path program 12 times [2020-11-29 22:03:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:12,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378583319] [2020-11-29 22:03:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378583319] [2020-11-29 22:03:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017208839] [2020-11-29 22:03:13,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:13,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 22:03:13,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 22:03:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:13,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:13,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2020-11-29 22:03:13,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716979854] [2020-11-29 22:03:13,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 22:03:13,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 22:03:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:03:13,807 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 28 states. [2020-11-29 22:03:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:13,955 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-11-29 22:03:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:03:13,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2020-11-29 22:03:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:13,956 INFO L225 Difference]: With dead ends: 47 [2020-11-29 22:03:13,956 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 22:03:13,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=496, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:03:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 22:03:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-11-29 22:03:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 22:03:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-11-29 22:03:13,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2020-11-29 22:03:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:13,966 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-11-29 22:03:13,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 22:03:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-11-29 22:03:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 22:03:13,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:13,967 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1] [2020-11-29 22:03:14,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 22:03:14,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1532551377, now seen corresponding path program 13 times [2020-11-29 22:03:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:14,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916257123] [2020-11-29 22:03:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:14,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916257123] [2020-11-29 22:03:14,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117555841] [2020-11-29 22:03:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 22:03:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:15,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:15,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2020-11-29 22:03:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282305025] [2020-11-29 22:03:15,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 22:03:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:15,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 22:03:15,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2020-11-29 22:03:15,188 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 30 states. [2020-11-29 22:03:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:15,334 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-11-29 22:03:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:03:15,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2020-11-29 22:03:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:15,335 INFO L225 Difference]: With dead ends: 50 [2020-11-29 22:03:15,335 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 22:03:15,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=569, Unknown=0, NotChecked=0, Total=930 [2020-11-29 22:03:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 22:03:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-11-29 22:03:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:03:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-11-29 22:03:15,344 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2020-11-29 22:03:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:15,344 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-11-29 22:03:15,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 22:03:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-11-29 22:03:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 22:03:15,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:15,345 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1] [2020-11-29 22:03:15,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:15,546 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash -735666203, now seen corresponding path program 14 times [2020-11-29 22:03:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:15,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602199194] [2020-11-29 22:03:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:15,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602199194] [2020-11-29 22:03:15,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533073865] [2020-11-29 22:03:15,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:03:15,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 22:03:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:16,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:16,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2020-11-29 22:03:16,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250149897] [2020-11-29 22:03:16,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 22:03:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 22:03:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2020-11-29 22:03:16,624 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 32 states. [2020-11-29 22:03:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:16,783 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-11-29 22:03:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 22:03:16,784 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2020-11-29 22:03:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:16,784 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:03:16,785 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 22:03:16,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=647, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:03:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 22:03:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-11-29 22:03:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 22:03:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-11-29 22:03:16,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2020-11-29 22:03:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:16,795 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-11-29 22:03:16,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 22:03:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-11-29 22:03:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 22:03:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:16,797 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1] [2020-11-29 22:03:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 22:03:17,012 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash 986307439, now seen corresponding path program 15 times [2020-11-29 22:03:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:17,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939036129] [2020-11-29 22:03:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:17,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939036129] [2020-11-29 22:03:17,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359624364] [2020-11-29 22:03:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:17,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 22:03:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 22:03:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:18,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:18,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2020-11-29 22:03:18,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959073683] [2020-11-29 22:03:18,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 22:03:18,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:18,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 22:03:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:03:18,057 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 34 states. [2020-11-29 22:03:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:18,199 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-11-29 22:03:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 22:03:18,199 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2020-11-29 22:03:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:18,200 INFO L225 Difference]: With dead ends: 56 [2020-11-29 22:03:18,200 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 22:03:18,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=730, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 22:03:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 22:03:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-11-29 22:03:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 22:03:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-11-29 22:03:18,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2020-11-29 22:03:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:18,210 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-11-29 22:03:18,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 22:03:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-11-29 22:03:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-29 22:03:18,212 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:18,212 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1] [2020-11-29 22:03:18,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 22:03:18,440 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1213692837, now seen corresponding path program 16 times [2020-11-29 22:03:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:18,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829550793] [2020-11-29 22:03:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:18,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829550793] [2020-11-29 22:03:18,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069841990] [2020-11-29 22:03:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:18,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:03:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:03:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:19,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:19,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2020-11-29 22:03:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957187980] [2020-11-29 22:03:19,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 22:03:19,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 22:03:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 22:03:19,803 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 36 states. [2020-11-29 22:03:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:19,960 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-11-29 22:03:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:03:19,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 53 [2020-11-29 22:03:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:19,961 INFO L225 Difference]: With dead ends: 59 [2020-11-29 22:03:19,961 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:03:19,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:03:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:03:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-11-29 22:03:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 22:03:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-11-29 22:03:19,971 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2020-11-29 22:03:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:19,971 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-11-29 22:03:19,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 22:03:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-11-29 22:03:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 22:03:19,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:19,973 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1] [2020-11-29 22:03:20,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:20,200 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2088658863, now seen corresponding path program 17 times [2020-11-29 22:03:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:20,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904458156] [2020-11-29 22:03:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:20,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904458156] [2020-11-29 22:03:20,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20738312] [2020-11-29 22:03:20,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:20,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 22:03:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 22:03:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:21,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:21,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2020-11-29 22:03:21,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999283229] [2020-11-29 22:03:21,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 22:03:21,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 22:03:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 22:03:21,541 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 38 states. [2020-11-29 22:03:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:21,737 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-11-29 22:03:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:03:21,738 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-11-29 22:03:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:21,739 INFO L225 Difference]: With dead ends: 62 [2020-11-29 22:03:21,739 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 22:03:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:03:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 22:03:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-11-29 22:03:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 22:03:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-11-29 22:03:21,761 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2020-11-29 22:03:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:21,762 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-11-29 22:03:21,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 22:03:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-11-29 22:03:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-29 22:03:21,767 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:21,767 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1] [2020-11-29 22:03:21,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:21,992 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2045020005, now seen corresponding path program 18 times [2020-11-29 22:03:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:21,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463642150] [2020-11-29 22:03:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:22,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463642150] [2020-11-29 22:03:22,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401295058] [2020-11-29 22:03:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:22,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 22:03:22,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 22:03:22,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:23,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:23,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2020-11-29 22:03:23,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159799183] [2020-11-29 22:03:23,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 22:03:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:23,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 22:03:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 22:03:23,695 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 40 states. [2020-11-29 22:03:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:23,916 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-11-29 22:03:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 22:03:23,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 59 [2020-11-29 22:03:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:23,918 INFO L225 Difference]: With dead ends: 65 [2020-11-29 22:03:23,918 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:03:23,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=631, Invalid=1009, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 22:03:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:03:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-11-29 22:03:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 22:03:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-29 22:03:23,934 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2020-11-29 22:03:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:23,935 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-29 22:03:23,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 22:03:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-29 22:03:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 22:03:23,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:23,936 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1] [2020-11-29 22:03:24,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:24,164 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash -920075281, now seen corresponding path program 19 times [2020-11-29 22:03:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:24,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403411612] [2020-11-29 22:03:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403411612] [2020-11-29 22:03:24,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702319961] [2020-11-29 22:03:24,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:24,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 22:03:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:26,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:26,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2020-11-29 22:03:26,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076003552] [2020-11-29 22:03:26,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 22:03:26,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 22:03:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 22:03:26,098 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 42 states. [2020-11-29 22:03:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:26,260 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-11-29 22:03:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 22:03:26,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2020-11-29 22:03:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:26,263 INFO L225 Difference]: With dead ends: 68 [2020-11-29 22:03:26,263 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 22:03:26,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1112, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 22:03:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 22:03:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-11-29 22:03:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 22:03:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-11-29 22:03:26,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2020-11-29 22:03:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:26,280 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-11-29 22:03:26,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 22:03:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-11-29 22:03:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-29 22:03:26,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:26,282 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1] [2020-11-29 22:03:26,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 22:03:26,508 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 518636325, now seen corresponding path program 20 times [2020-11-29 22:03:26,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:26,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963380293] [2020-11-29 22:03:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:26,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963380293] [2020-11-29 22:03:26,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118313786] [2020-11-29 22:03:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:03:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 22:03:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:27,725 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-29 22:03:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:28,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:28,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2020-11-29 22:03:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033145453] [2020-11-29 22:03:28,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 22:03:28,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 22:03:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 22:03:28,492 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 44 states. [2020-11-29 22:03:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:28,740 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-11-29 22:03:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 22:03:28,741 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2020-11-29 22:03:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:28,742 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:03:28,742 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 22:03:28,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=760, Invalid=1220, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 22:03:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 22:03:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-11-29 22:03:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-29 22:03:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-11-29 22:03:28,753 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2020-11-29 22:03:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:28,753 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-11-29 22:03:28,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 22:03:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-11-29 22:03:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-29 22:03:28,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:28,754 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1] [2020-11-29 22:03:28,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 22:03:28,980 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1697443887, now seen corresponding path program 21 times [2020-11-29 22:03:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:28,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103390066] [2020-11-29 22:03:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103390066] [2020-11-29 22:03:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918913424] [2020-11-29 22:03:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:29,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-29 22:03:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:29,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 22:03:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:30,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:30,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2020-11-29 22:03:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262096158] [2020-11-29 22:03:30,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-29 22:03:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-29 22:03:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 22:03:30,659 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 46 states. [2020-11-29 22:03:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:30,874 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-11-29 22:03:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:03:30,875 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2020-11-29 22:03:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:30,876 INFO L225 Difference]: With dead ends: 74 [2020-11-29 22:03:30,876 INFO L226 Difference]: Without dead ends: 73 [2020-11-29 22:03:30,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=829, Invalid=1333, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 22:03:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-29 22:03:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-11-29 22:03:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:03:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-11-29 22:03:30,891 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2020-11-29 22:03:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:30,892 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-11-29 22:03:30,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-29 22:03:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-11-29 22:03:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-29 22:03:30,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:30,893 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1] [2020-11-29 22:03:31,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:31,112 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -394055963, now seen corresponding path program 22 times [2020-11-29 22:03:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:31,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947331732] [2020-11-29 22:03:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947331732] [2020-11-29 22:03:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266487996] [2020-11-29 22:03:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:31,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:03:31,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 22:03:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:32,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2020-11-29 22:03:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918979927] [2020-11-29 22:03:32,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-29 22:03:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-29 22:03:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 22:03:32,952 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 48 states. [2020-11-29 22:03:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:33,136 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-11-29 22:03:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 22:03:33,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 71 [2020-11-29 22:03:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:33,140 INFO L225 Difference]: With dead ends: 77 [2020-11-29 22:03:33,140 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 22:03:33,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=901, Invalid=1451, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:03:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 22:03:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-11-29 22:03:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 22:03:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-11-29 22:03:33,153 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2020-11-29 22:03:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:33,154 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-11-29 22:03:33,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-29 22:03:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-11-29 22:03:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-29 22:03:33,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:33,155 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1] [2020-11-29 22:03:33,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 22:03:33,364 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1175524241, now seen corresponding path program 23 times [2020-11-29 22:03:33,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:33,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397939741] [2020-11-29 22:03:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397939741] [2020-11-29 22:03:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333269614] [2020-11-29 22:03:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:33,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-11-29 22:03:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-29 22:03:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:35,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:35,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2020-11-29 22:03:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252127575] [2020-11-29 22:03:35,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-29 22:03:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:35,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-29 22:03:35,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=1524, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 22:03:35,387 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 50 states. [2020-11-29 22:03:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:35,550 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-11-29 22:03:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 22:03:35,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2020-11-29 22:03:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:35,551 INFO L225 Difference]: With dead ends: 80 [2020-11-29 22:03:35,551 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 22:03:35,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=976, Invalid=1574, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 22:03:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 22:03:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-29 22:03:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 22:03:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-11-29 22:03:35,561 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2020-11-29 22:03:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:35,562 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-11-29 22:03:35,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-29 22:03:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-11-29 22:03:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-29 22:03:35,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:35,563 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1] [2020-11-29 22:03:35,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:35,784 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1120717477, now seen corresponding path program 24 times [2020-11-29 22:03:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:35,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931209024] [2020-11-29 22:03:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:36,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931209024] [2020-11-29 22:03:36,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173196655] [2020-11-29 22:03:36,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:36,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-29 22:03:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:36,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-29 22:03:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:37,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:37,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2020-11-29 22:03:37,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012810812] [2020-11-29 22:03:37,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-29 22:03:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-29 22:03:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 22:03:37,726 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 52 states. [2020-11-29 22:03:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:37,970 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-11-29 22:03:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 22:03:37,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 77 [2020-11-29 22:03:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:37,972 INFO L225 Difference]: With dead ends: 83 [2020-11-29 22:03:37,972 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 22:03:37,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1054, Invalid=1702, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 22:03:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 22:03:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-11-29 22:03:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 22:03:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-11-29 22:03:37,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2020-11-29 22:03:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:37,986 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-11-29 22:03:37,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-29 22:03:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-11-29 22:03:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-29 22:03:37,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:37,987 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1] [2020-11-29 22:03:38,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 22:03:38,212 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1781352273, now seen corresponding path program 25 times [2020-11-29 22:03:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:38,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645985918] [2020-11-29 22:03:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645985918] [2020-11-29 22:03:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99723813] [2020-11-29 22:03:38,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 53 conjunts are in the unsatisfiable core [2020-11-29 22:03:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:40,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:40,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2020-11-29 22:03:40,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364127843] [2020-11-29 22:03:40,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-29 22:03:40,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-29 22:03:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 22:03:40,557 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 54 states. [2020-11-29 22:03:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:40,829 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-11-29 22:03:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 22:03:40,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2020-11-29 22:03:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:40,831 INFO L225 Difference]: With dead ends: 86 [2020-11-29 22:03:40,831 INFO L226 Difference]: Without dead ends: 85 [2020-11-29 22:03:40,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1135, Invalid=1835, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 22:03:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-29 22:03:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-11-29 22:03:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 22:03:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-11-29 22:03:40,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2020-11-29 22:03:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:40,844 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-11-29 22:03:40,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-29 22:03:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-11-29 22:03:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-29 22:03:40,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:40,845 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1] [2020-11-29 22:03:41,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 22:03:41,064 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash 350393957, now seen corresponding path program 26 times [2020-11-29 22:03:41,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:41,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708726930] [2020-11-29 22:03:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708726930] [2020-11-29 22:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609486634] [2020-11-29 22:03:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:41,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:03:41,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-29 22:03:41,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:43,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:43,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2020-11-29 22:03:43,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089312110] [2020-11-29 22:03:43,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-29 22:03:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-29 22:03:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 22:03:43,882 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 56 states. [2020-11-29 22:03:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:44,133 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-11-29 22:03:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-29 22:03:44,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 83 [2020-11-29 22:03:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:44,134 INFO L225 Difference]: With dead ends: 89 [2020-11-29 22:03:44,134 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 22:03:44,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1219, Invalid=1973, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 22:03:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 22:03:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-11-29 22:03:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 22:03:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-11-29 22:03:44,148 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2020-11-29 22:03:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:44,148 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-11-29 22:03:44,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-29 22:03:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-11-29 22:03:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-29 22:03:44,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:44,149 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1] [2020-11-29 22:03:44,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 22:03:44,349 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1815893231, now seen corresponding path program 27 times [2020-11-29 22:03:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:44,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57972584] [2020-11-29 22:03:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57972584] [2020-11-29 22:03:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825079200] [2020-11-29 22:03:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:45,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-11-29 22:03:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2020-11-29 22:03:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:46,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:46,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2020-11-29 22:03:46,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177353076] [2020-11-29 22:03:46,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-29 22:03:46,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:46,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-29 22:03:46,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2020-11-29 22:03:46,684 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 58 states. [2020-11-29 22:03:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:46,850 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-11-29 22:03:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 22:03:46,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2020-11-29 22:03:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:46,851 INFO L225 Difference]: With dead ends: 92 [2020-11-29 22:03:46,851 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 22:03:46,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1306, Invalid=2116, Unknown=0, NotChecked=0, Total=3422 [2020-11-29 22:03:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 22:03:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-11-29 22:03:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 22:03:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-11-29 22:03:46,867 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2020-11-29 22:03:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:46,868 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-11-29 22:03:46,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-29 22:03:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-11-29 22:03:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 22:03:46,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:46,868 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1] [2020-11-29 22:03:47,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:47,069 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2132766171, now seen corresponding path program 28 times [2020-11-29 22:03:47,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:47,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477916192] [2020-11-29 22:03:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:47,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477916192] [2020-11-29 22:03:47,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818730547] [2020-11-29 22:03:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:47,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:03:47,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:47,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-29 22:03:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:49,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:49,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2020-11-29 22:03:49,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418245361] [2020-11-29 22:03:49,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-29 22:03:49,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-29 22:03:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 22:03:49,886 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 60 states. [2020-11-29 22:03:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:50,099 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-11-29 22:03:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 22:03:50,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 89 [2020-11-29 22:03:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:50,100 INFO L225 Difference]: With dead ends: 95 [2020-11-29 22:03:50,101 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 22:03:50,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1396, Invalid=2264, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 22:03:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 22:03:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-11-29 22:03:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 22:03:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-11-29 22:03:50,119 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2020-11-29 22:03:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:50,120 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-11-29 22:03:50,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-29 22:03:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-11-29 22:03:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-29 22:03:50,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:50,121 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1] [2020-11-29 22:03:50,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 22:03:50,348 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1785741009, now seen corresponding path program 29 times [2020-11-29 22:03:50,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:50,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899648016] [2020-11-29 22:03:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:03:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899648016] [2020-11-29 22:03:51,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100391883] [2020-11-29 22:03:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:51,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-11-29 22:03:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:03:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-29 22:03:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:03:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:03:53,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:03:53,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2020-11-29 22:03:53,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650726762] [2020-11-29 22:03:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-29 22:03:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:03:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-29 22:03:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 22:03:53,178 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 62 states. [2020-11-29 22:03:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:03:53,510 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-11-29 22:03:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 22:03:53,511 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 92 [2020-11-29 22:03:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:03:53,511 INFO L225 Difference]: With dead ends: 98 [2020-11-29 22:03:53,511 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 22:03:53,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1489, Invalid=2417, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 22:03:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 22:03:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-11-29 22:03:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 22:03:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-11-29 22:03:53,526 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2020-11-29 22:03:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:03:53,526 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-11-29 22:03:53,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-29 22:03:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-11-29 22:03:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-29 22:03:53,527 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:03:53,527 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1] [2020-11-29 22:03:53,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:03:53,727 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:03:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:03:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1545421339, now seen corresponding path program 30 times [2020-11-29 22:03:53,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:03:53,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539668767] [2020-11-29 22:03:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:03:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:03:53,772 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:03:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:03:53,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:03:53,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:03:53,868 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:03:53,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-29 22:03:53,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:03:53 BoogieIcfgContainer [2020-11-29 22:03:53,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:03:53,952 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:03:53,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:03:53,952 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:03:53,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:03:02" (3/4) ... [2020-11-29 22:03:53,954 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:03:54,042 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_28eb8173-46be-4a32-ae42-028138f48bd1/bin/uautomizer/witness.graphml [2020-11-29 22:03:54,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:03:54,044 INFO L168 Benchmark]: Toolchain (without parser) took 52294.31 ms. Allocated memory was 102.8 MB in the beginning and 314.6 MB in the end (delta: 211.8 MB). Free memory was 72.4 MB in the beginning and 147.1 MB in the end (delta: -74.7 MB). Peak memory consumption was 137.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,044 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 38.3 MB in the beginning and 38.3 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:03:54,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.74 ms. Allocated memory is still 102.8 MB. Free memory was 72.2 MB in the beginning and 80.8 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,045 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.77 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:03:54,045 INFO L168 Benchmark]: Boogie Preprocessor took 44.57 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,045 INFO L168 Benchmark]: RCFGBuilder took 324.54 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 67.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,046 INFO L168 Benchmark]: TraceAbstraction took 51445.80 ms. Allocated memory was 102.8 MB in the beginning and 314.6 MB in the end (delta: 211.8 MB). Free memory was 66.6 MB in the beginning and 152.3 MB in the end (delta: -85.7 MB). Peak memory consumption was 127.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,046 INFO L168 Benchmark]: Witness Printer took 91.37 ms. Allocated memory is still 314.6 MB. Free memory was 152.3 MB in the beginning and 147.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:03:54,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 38.3 MB in the beginning and 38.3 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.74 ms. Allocated memory is still 102.8 MB. Free memory was 72.2 MB in the beginning and 80.8 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.77 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.57 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 324.54 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 67.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51445.80 ms. Allocated memory was 102.8 MB in the beginning and 314.6 MB in the end (delta: 211.8 MB). Free memory was 66.6 MB in the beginning and 152.3 MB in the end (delta: -85.7 MB). Peak memory consumption was 127.5 MB. Max. memory is 16.1 GB. * Witness Printer took 91.37 ms. Allocated memory is still 314.6 MB. Free memory was 152.3 MB in the beginning and 147.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L20] int x = __VERIFIER_nondet_int(); [L21] int y = __VERIFIER_nondet_int(); [L22] COND FALSE !(!(x==1 && y==1)) [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] x+y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.3s, OverallIterations: 33, TraceHistogramMax: 31, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 728 SDslu, 1213 SDs, 0 SdLazy, 2489 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1958 GetRequests, 995 SyntacticMatches, 0 SemanticMatches, 963 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18329 ImplicationChecksByTransitivity, 26.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 32 MinimizatonAttempts, 32 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 3024 NumberOfCodeBlocks, 3024 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 2867 ConstructedInterpolants, 922 QuantifiedInterpolants, 2381511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4223 ConjunctsInSsa, 962 ConjunctsInUnsatCore, 62 InterpolantComputations, 3 PerfectInterpolantSequences, 3/26106 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...