./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8b3f04ec92be96a6d3b17ca538a3be31737a820 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:14:49,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:14:49,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:14:49,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:14:49,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:14:49,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:14:49,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:14:49,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:14:49,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:14:49,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:14:49,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:14:49,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:14:49,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:14:49,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:14:49,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:14:49,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:14:49,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:14:49,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:14:49,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:14:49,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:14:49,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:14:49,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:14:49,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:14:49,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:14:49,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:14:49,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:14:49,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:14:49,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:14:49,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:14:49,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:14:49,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:14:49,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:14:49,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:14:49,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:14:49,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:14:49,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:14:49,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:14:49,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:14:49,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:14:49,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:14:49,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:14:49,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:14:49,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:14:49,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:14:49,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:14:49,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:14:49,690 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:14:49,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:14:49,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:14:49,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:14:49,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:14:49,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:14:49,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:14:49,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:14:49,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:14:49,692 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:14:49,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:14:49,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:14:49,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:14:49,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:14:49,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:14:49,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:14:49,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:14:49,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:14:49,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:14:49,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:14:49,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:14:49,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:14:49,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:14:49,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:14:49,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:14:49,697 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_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8b3f04ec92be96a6d3b17ca538a3be31737a820 [2020-11-28 03:14:50,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:14:50,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:14:50,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:14:50,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:14:50,104 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:14:50,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-11-28 03:14:50,186 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/data/be55b90d5/55fc7b80810e47fd9902205c9dbc6c6b/FLAGf5461b2fd [2020-11-28 03:14:50,733 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:14:50,733 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-11-28 03:14:50,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/data/be55b90d5/55fc7b80810e47fd9902205c9dbc6c6b/FLAGf5461b2fd [2020-11-28 03:14:51,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/data/be55b90d5/55fc7b80810e47fd9902205c9dbc6c6b [2020-11-28 03:14:51,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:14:51,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:14:51,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:51,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:14:51,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:14:51,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6393ecef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51, skipping insertion in model container [2020-11-28 03:14:51,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:14:51,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:14:51,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:51,385 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:14:51,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:51,422 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:14:51,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51 WrapperNode [2020-11-28 03:14:51,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:51,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:51,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:14:51,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:14:51,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:51,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:14:51,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:14:51,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:14:51,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... [2020-11-28 03:14:51,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:14:51,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:14:51,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:14:51,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:14:51,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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 [2020-11-28 03:14:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:14:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:14:51,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:14:51,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:14:52,017 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:14:52,018 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-11-28 03:14:52,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:52 BoogieIcfgContainer [2020-11-28 03:14:52,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:14:52,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:14:52,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:14:52,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:14:52,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:14:51" (1/3) ... [2020-11-28 03:14:52,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d08be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:52, skipping insertion in model container [2020-11-28 03:14:52,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:51" (2/3) ... [2020-11-28 03:14:52,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d08be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:52, skipping insertion in model container [2020-11-28 03:14:52,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:52" (3/3) ... [2020-11-28 03:14:52,059 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2020-11-28 03:14:52,072 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:14:52,078 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:14:52,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:14:52,124 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:14:52,125 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:14:52,125 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:14:52,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:14:52,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:14:52,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:14:52,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:14:52,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:14:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 03:14:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:14:52,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:52,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:52,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash 120366923, now seen corresponding path program 1 times [2020-11-28 03:14:52,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:52,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917802017] [2020-11-28 03:14:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:52,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917802017] [2020-11-28 03:14:52,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:52,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:14:52,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084099886] [2020-11-28 03:14:52,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:14:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:14:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:14:52,413 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-11-28 03:14:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:52,430 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-11-28 03:14:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:14:52,431 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-28 03:14:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:52,441 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:14:52,442 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:14:52,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:14:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:14:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 03:14:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:14:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-28 03:14:52,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-11-28 03:14:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:52,482 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-28 03:14:52,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:14:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-28 03:14:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:14:52,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:52,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:52,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:14:52,488 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-11-28 03:14:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:52,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936231170] [2020-11-28 03:14:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:52,540 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:52,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546279795] [2020-11-28 03:14:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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 [2020-11-28 03:14:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:14:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:52,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936231170] [2020-11-28 03:14:52,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:52,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546279795] [2020-11-28 03:14:52,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:52,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:14:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696593300] [2020-11-28 03:14:52,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:14:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:14:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:14:52,751 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-11-28 03:14:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:52,881 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-28 03:14:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:52,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:14:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:52,883 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:14:52,883 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:14:52,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:14:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2020-11-28 03:14:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:14:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 03:14:52,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2020-11-28 03:14:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:52,891 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 03:14:52,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:14:52,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 03:14:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:14:52,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:52,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:53,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:14:53,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1182842216, now seen corresponding path program 1 times [2020-11-28 03:14:53,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:53,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355417613] [2020-11-28 03:14:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:53,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355417613] [2020-11-28 03:14:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:53,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:14:53,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710230251] [2020-11-28 03:14:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:14:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:14:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:14:53,198 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-11-28 03:14:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:53,229 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-28 03:14:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:14:53,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 03:14:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:53,232 INFO L225 Difference]: With dead ends: 23 [2020-11-28 03:14:53,232 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:14:53,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:14:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:14:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:14:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:14:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-28 03:14:53,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2020-11-28 03:14:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:53,238 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-28 03:14:53,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:14:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-28 03:14:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:14:53,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:53,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:53,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:14:53,240 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1414808831, now seen corresponding path program 1 times [2020-11-28 03:14:53,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:53,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281396413] [2020-11-28 03:14:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:53,278 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:53,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421478851] [2020-11-28 03:14:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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 [2020-11-28 03:14:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:14:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:53,448 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:14:53,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:53,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281396413] [2020-11-28 03:14:53,501 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:53,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421478851] [2020-11-28 03:14:53,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:53,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:53,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335459418] [2020-11-28 03:14:53,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:53,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:53,505 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-11-28 03:14:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:53,695 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:14:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:53,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:14:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:53,697 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:14:53,698 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 03:14:53,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:14:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 03:14:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-11-28 03:14:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:14:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 03:14:53,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-11-28 03:14:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:53,704 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 03:14:53,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 03:14:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:14:53,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:53,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:53,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:53,907 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash -517382468, now seen corresponding path program 1 times [2020-11-28 03:14:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:53,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842644428] [2020-11-28 03:14:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:53,927 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:53,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446265599] [2020-11-28 03:14:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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 [2020-11-28 03:14:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:14:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:54,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842644428] [2020-11-28 03:14:54,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446265599] [2020-11-28 03:14:54,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:54,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 03:14:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68194005] [2020-11-28 03:14:54,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:54,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:54,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:54,154 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-11-28 03:14:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:54,214 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-11-28 03:14:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:54,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 03:14:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:54,215 INFO L225 Difference]: With dead ends: 28 [2020-11-28 03:14:54,216 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:14:54,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:14:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:14:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 03:14:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:14:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-28 03:14:54,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-28 03:14:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:54,233 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-28 03:14:54,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-28 03:14:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:14:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:54,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:54,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:54,436 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1140976984, now seen corresponding path program 1 times [2020-11-28 03:14:54,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:54,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719302982] [2020-11-28 03:14:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:54,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368034753] [2020-11-28 03:14:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/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 [2020-11-28 03:14:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:14:54,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:14:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:14:54,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:14:54,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:14:54,594 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:14:54,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:54,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:14:54 BoogieIcfgContainer [2020-11-28 03:14:54,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:14:54,852 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:14:54,852 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:14:54,852 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:14:54,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:52" (3/4) ... [2020-11-28 03:14:54,856 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:14:54,915 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_77df23f0-5ac9-4af3-b134-cb41ee0e8c32/bin/uautomizer/witness.graphml [2020-11-28 03:14:54,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:14:54,917 INFO L168 Benchmark]: Toolchain (without parser) took 3845.87 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 52.0 MB in the end (delta: 487.7 kB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,918 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:54,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.21 ms. Allocated memory is still 90.2 MB. Free memory was 52.3 MB in the beginning and 67.6 MB in the end (delta: -15.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.83 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 66.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,921 INFO L168 Benchmark]: Boogie Preprocessor took 28.81 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 65.1 MB in the end (delta: 943.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:54,922 INFO L168 Benchmark]: RCFGBuilder took 532.74 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 52.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,923 INFO L168 Benchmark]: TraceAbstraction took 2817.15 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.8 MB in the beginning and 54.1 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,924 INFO L168 Benchmark]: Witness Printer took 63.12 ms. Allocated memory is still 109.1 MB. Free memory was 54.1 MB in the beginning and 52.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:54,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.21 ms. Allocated memory is still 90.2 MB. Free memory was 52.3 MB in the beginning and 67.6 MB in the end (delta: -15.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.83 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 66.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.81 ms. Allocated memory is still 90.2 MB. Free memory was 66.0 MB in the beginning and 65.1 MB in the end (delta: 943.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 532.74 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 52.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2817.15 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.8 MB in the beginning and 54.1 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * Witness Printer took 63.12 ms. Allocated memory is still 109.1 MB. Free memory was 54.1 MB in the beginning and 52.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L13] COND TRUE !(cond) VAL [counter=2] [L6] __assert_fail("0", "prodbin-ll.c", 6, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 68 SDslu, 72 SDs, 0 SdLazy, 59 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 1177 SizeOfPredicates, 12 NumberOfNonLiveVariables, 220 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/3 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...