./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.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_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 e095661a00784e6d7da38858d8505be229f1ade1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:59:31,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:59:31,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:59:31,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:59:31,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:59:31,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:59:31,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:59:31,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:59:31,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:59:31,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:59:31,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:59:31,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:59:31,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:59:31,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:59:31,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:59:31,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:59:31,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:59:31,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:59:31,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:59:31,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:59:31,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:59:31,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:59:31,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:59:31,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:59:31,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:59:31,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:59:31,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:59:31,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:59:31,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:59:31,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:59:31,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:59:31,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:59:31,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:59:31,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:59:31,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:59:31,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:59:31,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:59:31,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:59:31,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:59:31,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:59:31,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:59:31,760 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:59:31,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:59:31,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:59:31,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:59:31,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:59:31,799 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:59:31,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:59:31,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:59:31,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:59:31,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:59:31,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:59:31,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:59:31,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:59:31,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:59:31,801 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:59:31,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:59:31,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:59:31,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:59:31,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:59:31,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:59:31,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:59:31,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:59:31,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:31,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:59:31,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:59:31,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:59:31,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:59:31,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:59:31,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:59:31,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:59:31,805 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_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e095661a00784e6d7da38858d8505be229f1ade1 [2020-11-28 02:59:32,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:59:32,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:59:32,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:59:32,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:59:32,103 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:59:32,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2020-11-28 02:59:32,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/data/70ffc5f21/aa5d7977221447ba86207e9d53253a0f/FLAGa5b987e0d [2020-11-28 02:59:32,652 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:59:32,655 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2020-11-28 02:59:32,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/data/70ffc5f21/aa5d7977221447ba86207e9d53253a0f/FLAGa5b987e0d [2020-11-28 02:59:33,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/data/70ffc5f21/aa5d7977221447ba86207e9d53253a0f [2020-11-28 02:59:33,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:59:33,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:59:33,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:33,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:59:33,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:59:33,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a202e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33, skipping insertion in model container [2020-11-28 02:59:33,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:59:33,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:59:33,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:33,302 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:59:33,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:33,357 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:59:33,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33 WrapperNode [2020-11-28 02:59:33,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:33,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:33,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:59:33,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:59:33,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:33,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:59:33,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:59:33,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:59:33,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:59:33,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:59:33,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:59:33,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:59:33,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 02:59:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:59:33,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:59:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:59:33,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:59:33,871 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:59:33,871 INFO L298 CfgBuilder]: Removed 34 assume(true) statements. [2020-11-28 02:59:33,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:33 BoogieIcfgContainer [2020-11-28 02:59:33,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:59:33,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:59:33,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:59:33,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:59:33,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:59:33" (1/3) ... [2020-11-28 02:59:33,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448ff97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:33, skipping insertion in model container [2020-11-28 02:59:33,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (2/3) ... [2020-11-28 02:59:33,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448ff97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:33, skipping insertion in model container [2020-11-28 02:59:33,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:33" (3/3) ... [2020-11-28 02:59:33,881 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2020-11-28 02:59:33,891 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:59:33,896 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 02:59:33,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 02:59:33,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:59:33,932 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:59:33,932 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:59:33,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:59:33,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:59:33,932 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:59:33,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:59:33,933 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:59:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-28 02:59:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:59:33,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:33,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:59:33,954 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-28 02:59:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109393890] [2020-11-28 02:59:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:34,270 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 02:59:34,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109393890] [2020-11-28 02:59:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:59:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98941825] [2020-11-28 02:59:34,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:34,311 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-11-28 02:59:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:34,496 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-11-28 02:59:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:34,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 02:59:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:34,507 INFO L225 Difference]: With dead ends: 102 [2020-11-28 02:59:34,507 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 02:59:34,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 02:59:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2020-11-28 02:59:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 02:59:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-28 02:59:34,557 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-11-28 02:59:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:34,557 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-28 02:59:34,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-28 02:59:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:59:34,560 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:34,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:34,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:59:34,563 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash 179013485, now seen corresponding path program 1 times [2020-11-28 02:59:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:34,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408567939] [2020-11-28 02:59:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:34,593 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:34,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639379923] [2020-11-28 02:59:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 02:59:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:34,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:59:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:34,728 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 02:59:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408567939] [2020-11-28 02:59:34,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639379923] [2020-11-28 02:59:34,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:34,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:59:34,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160173328] [2020-11-28 02:59:34,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:34,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:34,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:34,733 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-11-28 02:59:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:34,762 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-11-28 02:59:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:59:34,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:59:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:34,767 INFO L225 Difference]: With dead ends: 54 [2020-11-28 02:59:34,767 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 02:59:34,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 02:59:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 02:59:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-28 02:59:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 02:59:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-28 02:59:34,782 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-11-28 02:59:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-28 02:59:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-28 02:59:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:59:34,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:34,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:35,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 02:59:35,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash 179688749, now seen corresponding path program 1 times [2020-11-28 02:59:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:35,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689658675] [2020-11-28 02:59:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,100 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 02:59:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689658675] [2020-11-28 02:59:35,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:35,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:59:35,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347618160] [2020-11-28 02:59:35,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:35,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:35,103 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-11-28 02:59:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:35,212 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-11-28 02:59:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:35,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:59:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:35,214 INFO L225 Difference]: With dead ends: 54 [2020-11-28 02:59:35,214 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 02:59:35,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 02:59:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2020-11-28 02:59:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 02:59:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-28 02:59:35,226 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2020-11-28 02:59:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:35,227 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-28 02:59:35,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-28 02:59:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:59:35,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:35,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:35,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:59:35,228 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash 882382672, now seen corresponding path program 1 times [2020-11-28 02:59:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:35,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862750893] [2020-11-28 02:59:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:35,244 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:35,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912121073] [2020-11-28 02:59:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 02:59:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:59:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:35,321 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 02:59:35,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862750893] [2020-11-28 02:59:35,322 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:35,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912121073] [2020-11-28 02:59:35,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:35,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:59:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945331196] [2020-11-28 02:59:35,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:35,324 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-11-28 02:59:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:35,464 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-11-28 02:59:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:35,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 02:59:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:35,466 INFO L225 Difference]: With dead ends: 79 [2020-11-28 02:59:35,466 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 02:59:35,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 02:59:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-11-28 02:59:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 02:59:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-11-28 02:59:35,476 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 10 [2020-11-28 02:59:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:35,476 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-11-28 02:59:35,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-11-28 02:59:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 02:59:35,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:35,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:35,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:35,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2079564058, now seen corresponding path program 1 times [2020-11-28 02:59:35,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:35,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142582012] [2020-11-28 02:59:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:35,717 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:35,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649671009] [2020-11-28 02:59:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 02:59:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:59:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:35,805 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 02:59:35,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142582012] [2020-11-28 02:59:35,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:35,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649671009] [2020-11-28 02:59:35,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:35,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:59:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704859037] [2020-11-28 02:59:35,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:59:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:59:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:59:35,808 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2020-11-28 02:59:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:35,890 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-11-28 02:59:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:59:35,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-28 02:59:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:35,892 INFO L225 Difference]: With dead ends: 66 [2020-11-28 02:59:35,892 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 02:59:35,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 02:59:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 02:59:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-11-28 02:59:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 02:59:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-11-28 02:59:35,900 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 14 [2020-11-28 02:59:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:35,901 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-11-28 02:59:35,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:59:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-11-28 02:59:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:59:35,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:35,902 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:36,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:36,121 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 18473186, now seen corresponding path program 1 times [2020-11-28 02:59:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724946525] [2020-11-28 02:59:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:36,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853349563] [2020-11-28 02:59:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 02:59:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:59:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724946525] [2020-11-28 02:59:36,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853349563] [2020-11-28 02:59:36,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:36,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 02:59:36,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938037849] [2020-11-28 02:59:36,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:36,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:36,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:36,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:36,219 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-11-28 02:59:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:36,249 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-11-28 02:59:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:59:36,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-28 02:59:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:36,251 INFO L225 Difference]: With dead ends: 78 [2020-11-28 02:59:36,251 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 02:59:36,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:59:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 02:59:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-28 02:59:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-28 02:59:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-11-28 02:59:36,259 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 18 [2020-11-28 02:59:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:36,259 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-11-28 02:59:36,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-11-28 02:59:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:59:36,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:36,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:36,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:36,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash 667400610, now seen corresponding path program 1 times [2020-11-28 02:59:36,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:36,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680617547] [2020-11-28 02:59:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:36,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:36,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614528187] [2020-11-28 02:59:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 [2020-11-28 02:59:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 02:59:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680617547] [2020-11-28 02:59:36,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:59:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614528187] [2020-11-28 02:59:36,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:59:36,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:59:36,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827394339] [2020-11-28 02:59:36,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:36,636 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 5 states. [2020-11-28 02:59:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:36,818 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2020-11-28 02:59:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:59:36,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-28 02:59:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:36,820 INFO L225 Difference]: With dead ends: 126 [2020-11-28 02:59:36,820 INFO L226 Difference]: Without dead ends: 86 [2020-11-28 02:59:36,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:59:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-28 02:59:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-11-28 02:59:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 02:59:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-11-28 02:59:36,831 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 18 [2020-11-28 02:59:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:36,831 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-11-28 02:59:36,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-11-28 02:59:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 02:59:36,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:36,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:37,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 02:59:37,033 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 293037475, now seen corresponding path program 1 times [2020-11-28 02:59:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:37,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071235553] [2020-11-28 02:59:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:37,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:59:37,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541589802] [2020-11-28 02:59:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/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 [2020-11-28 02:59:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:37,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:37,130 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:37,177 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:59:37,177 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:59:37,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:37,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:59:37 BoogieIcfgContainer [2020-11-28 02:59:37,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:59:37,421 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:59:37,421 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:59:37,421 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:59:37,422 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:33" (3/4) ... [2020-11-28 02:59:37,423 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:59:37,473 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1ec62aa6-0648-4d97-a0c8-2c35bfa15348/bin/uautomizer/witness.graphml [2020-11-28 02:59:37,474 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:59:37,475 INFO L168 Benchmark]: Toolchain (without parser) took 4444.57 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 64.2 MB in the beginning and 84.4 MB in the end (delta: -20.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,476 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 69.6 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:37,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 98.6 MB. Free memory was 64.0 MB in the beginning and 75.1 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,477 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.32 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,478 INFO L168 Benchmark]: Boogie Preprocessor took 50.96 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 72.5 MB in the end (delta: 938.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:37,479 INFO L168 Benchmark]: RCFGBuilder took 408.85 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 56.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,479 INFO L168 Benchmark]: TraceAbstraction took 3546.76 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 56.2 MB in the beginning and 87.6 MB in the end (delta: -31.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,480 INFO L168 Benchmark]: Witness Printer took 52.42 ms. Allocated memory is still 130.0 MB. Free memory was 87.6 MB in the beginning and 84.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:37,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 69.6 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 98.6 MB. Free memory was 64.0 MB in the beginning and 75.1 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.32 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.96 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 72.5 MB in the end (delta: 938.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 408.85 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 56.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3546.76 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 56.2 MB in the beginning and 87.6 MB in the end (delta: -31.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Witness Printer took 52.42 ms. Allocated memory is still 130.0 MB. Free memory was 87.6 MB in the beginning and 84.4 MB in the end (delta: 3.1 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: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L38] COND TRUE !(r >= d) VAL [counter=2] [L44] EXPR counter++ VAL [counter=3] [L44] COND FALSE !(counter++<2) [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND TRUE !(cond) VAL [counter=3] [L8] __assert_fail("0", "hard2.c", 8, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 39 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 216 SDtfs, 189 SDslu, 328 SDs, 0 SdLazy, 228 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, 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, 7 MinimizatonAttempts, 73 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 5559 SizeOfPredicates, 17 NumberOfNonLiveVariables, 401 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 0/9 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...