./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 e042943c5d2d2df9c6856b10a20aadc6a7d57626 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-69874e2 [2020-12-01 15:26:20,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:26:20,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:26:20,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:26:20,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:26:20,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:26:20,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:26:20,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:26:20,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:26:20,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:26:20,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:26:20,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:26:20,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:26:20,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:26:20,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:26:20,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:26:20,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:26:20,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:26:20,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:26:20,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:26:20,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:26:20,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:26:20,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:26:20,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:26:20,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:26:20,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:26:20,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:26:20,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:26:20,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:26:20,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:26:20,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:26:20,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:26:20,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:26:20,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:26:20,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:26:20,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:26:20,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:26:20,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:26:20,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:26:20,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:26:20,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:26:20,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:26:20,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:26:20,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:26:20,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:26:20,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:26:20,739 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:26:20,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:26:20,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:26:20,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:26:20,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:26:20,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:26:20,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:26:20,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:26:20,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:26:20,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:26:20,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:26:20,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:26:20,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:26:20,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:26:20,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:26:20,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:26:20,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:26:20,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:26:20,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:26:20,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:26:20,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:26:20,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:26:20,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:26:20,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:26:20,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:26:20,753 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_20fb04b2-473e-4081-821e-2458238b9e28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e042943c5d2d2df9c6856b10a20aadc6a7d57626 [2020-12-01 15:26:21,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:26:21,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:26:21,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:26:21,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:26:21,053 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:26:21,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-01 15:26:21,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/data/aa81f1a4f/9026692aee32490bab34355512a212e1/FLAG12475d583 [2020-12-01 15:26:21,541 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:26:21,542 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-01 15:26:21,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/data/aa81f1a4f/9026692aee32490bab34355512a212e1/FLAG12475d583 [2020-12-01 15:26:21,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/data/aa81f1a4f/9026692aee32490bab34355512a212e1 [2020-12-01 15:26:21,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:26:21,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:26:21,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:21,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:26:21,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:26:21,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:21" (1/1) ... [2020-12-01 15:26:21,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381511a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:21, skipping insertion in model container [2020-12-01 15:26:21,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:21" (1/1) ... [2020-12-01 15:26:21,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:26:21,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:26:22,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:22,166 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:26:22,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:22,205 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:26:22,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22 WrapperNode [2020-12-01 15:26:22,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:22,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:22,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:26:22,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:26:22,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:22,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:26:22,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:26:22,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:26:22,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... [2020-12-01 15:26:22,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:26:22,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:26:22,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:26:22,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:26:22,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:26:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:26:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:26:22,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:26:22,608 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:26:22,609 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-01 15:26:22,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:22 BoogieIcfgContainer [2020-12-01 15:26:22,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:26:22,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:26:22,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:26:22,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:26:22,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:26:21" (1/3) ... [2020-12-01 15:26:22,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc86016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:22, skipping insertion in model container [2020-12-01 15:26:22,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:22" (2/3) ... [2020-12-01 15:26:22,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc86016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:22, skipping insertion in model container [2020-12-01 15:26:22,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:22" (3/3) ... [2020-12-01 15:26:22,633 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2020-12-01 15:26:22,659 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:26:22,662 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-01 15:26:22,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-01 15:26:22,702 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:26:22,702 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:26:22,703 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:26:22,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:26:22,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:26:22,703 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:26:22,703 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:26:22,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:26:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-01 15:26:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 15:26:22,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:22,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:26:22,757 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:22,763 INFO L82 PathProgramCache]: Analyzing trace with hash 890491815, now seen corresponding path program 1 times [2020-12-01 15:26:22,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449590523] [2020-12-01 15:26:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:22,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449590523] [2020-12-01 15:26:22,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:22,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:26:22,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184615585] [2020-12-01 15:26:22,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:26:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:26:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:26:22,932 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-01 15:26:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:22,948 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-01 15:26:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:26:22,949 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-01 15:26:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:22,956 INFO L225 Difference]: With dead ends: 34 [2020-12-01 15:26:22,957 INFO L226 Difference]: Without dead ends: 14 [2020-12-01 15:26:22,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:26:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-01 15:26:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-01 15:26:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-01 15:26:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-01 15:26:22,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-01 15:26:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:22,990 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-01 15:26:22,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:26:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-01 15:26:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 15:26:22,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:22,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:26:22,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:26:22,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:22,994 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-01 15:26:22,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:22,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783499109] [2020-12-01 15:26:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:23,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:23,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082847385] [2020-12-01 15:26:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:26:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:23,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783499109] [2020-12-01 15:26:23,157 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:23,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082847385] [2020-12-01 15:26:23,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:23,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:26:23,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190646266] [2020-12-01 15:26:23,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:26:23,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:26:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:26:23,162 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2020-12-01 15:26:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:23,236 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-01 15:26:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:26:23,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-01 15:26:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:23,238 INFO L225 Difference]: With dead ends: 30 [2020-12-01 15:26:23,238 INFO L226 Difference]: Without dead ends: 23 [2020-12-01 15:26:23,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-01 15:26:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-12-01 15:26:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-01 15:26:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-01 15:26:23,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-12-01 15:26:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:23,246 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-01 15:26:23,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:26:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-01 15:26:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:26:23,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:23,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:23,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:26:23,472 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1114333688, now seen corresponding path program 1 times [2020-12-01 15:26:23,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:23,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174179344] [2020-12-01 15:26:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:23,509 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:23,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096530414] [2020-12-01 15:26:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-01 15:26:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:23,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174179344] [2020-12-01 15:26:23,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:23,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096530414] [2020-12-01 15:26:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:23,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:26:23,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214635870] [2020-12-01 15:26:23,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:26:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:26:23,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:26:23,867 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-12-01 15:26:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:24,018 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-01 15:26:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:26:24,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-01 15:26:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:24,021 INFO L225 Difference]: With dead ends: 35 [2020-12-01 15:26:24,022 INFO L226 Difference]: Without dead ends: 33 [2020-12-01 15:26:24,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-01 15:26:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-01 15:26:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-01 15:26:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-01 15:26:24,035 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-01 15:26:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:24,035 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-01 15:26:24,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:26:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-01 15:26:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:26:24,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:24,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:24,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:24,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1057075386, now seen corresponding path program 1 times [2020-12-01 15:26:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:24,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317185467] [2020-12-01 15:26:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:24,272 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:24,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230382688] [2020-12-01 15:26:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 15:26:24,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:24,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317185467] [2020-12-01 15:26:24,514 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:24,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230382688] [2020-12-01 15:26:24,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:24,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:26:24,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957132051] [2020-12-01 15:26:24,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:26:24,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:24,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:26:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:26:24,517 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-12-01 15:26:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:24,661 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-01 15:26:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:26:24,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-01 15:26:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:24,664 INFO L225 Difference]: With dead ends: 39 [2020-12-01 15:26:24,664 INFO L226 Difference]: Without dead ends: 33 [2020-12-01 15:26:24,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-01 15:26:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-01 15:26:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 15:26:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-01 15:26:24,679 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2020-12-01 15:26:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:24,679 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-01 15:26:24,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:26:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-01 15:26:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:26:24,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:24,681 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:24,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:24,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:24,896 INFO L82 PathProgramCache]: Analyzing trace with hash 184570261, now seen corresponding path program 1 times [2020-12-01 15:26:24,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:24,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129457428] [2020-12-01 15:26:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:24,911 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:24,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813745948] [2020-12-01 15:26:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:26:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:25,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129457428] [2020-12-01 15:26:25,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:25,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813745948] [2020-12-01 15:26:25,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:25,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-01 15:26:25,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853565267] [2020-12-01 15:26:25,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:26:25,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:25,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:26:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:25,019 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-01 15:26:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:25,053 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-01 15:26:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:26:25,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-01 15:26:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:25,056 INFO L225 Difference]: With dead ends: 32 [2020-12-01 15:26:25,057 INFO L226 Difference]: Without dead ends: 28 [2020-12-01 15:26:25,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:26:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-01 15:26:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-01 15:26:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 15:26:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-01 15:26:25,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2020-12-01 15:26:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:25,063 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-01 15:26:25,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:26:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-01 15:26:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:26:25,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:25,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:25,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:25,268 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1318516494, now seen corresponding path program 1 times [2020-12-01 15:26:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:25,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387735007] [2020-12-01 15:26:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:25,287 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:25,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038245687] [2020-12-01 15:26:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-01 15:26:25,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:25,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387735007] [2020-12-01 15:26:25,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038245687] [2020-12-01 15:26:25,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:25,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 15:26:25,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68886380] [2020-12-01 15:26:25,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:26:25,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:26:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:26:25,632 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 11 states. [2020-12-01 15:26:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:25,896 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-01 15:26:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:26:25,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-01 15:26:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:25,898 INFO L225 Difference]: With dead ends: 39 [2020-12-01 15:26:25,898 INFO L226 Difference]: Without dead ends: 35 [2020-12-01 15:26:25,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:26:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-01 15:26:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-12-01 15:26:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 15:26:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-01 15:26:25,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-12-01 15:26:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:25,908 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-01 15:26:25,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:26:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-01 15:26:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:26:25,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:25,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-01 15:26:26,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 15:26:26,124 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -250338906, now seen corresponding path program 2 times [2020-12-01 15:26:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:26,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734651867] [2020-12-01 15:26:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:26,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:26,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859878781] [2020-12-01 15:26:26,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/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 [2020-12-01 15:26:26,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:26:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:26,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734651867] [2020-12-01 15:26:26,290 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:26:26,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859878781] [2020-12-01 15:26:26,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:26,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 15:26:26,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256907872] [2020-12-01 15:26:26,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:26:26,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:26,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:26:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:26:26,293 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-12-01 15:26:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:26,325 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-01 15:26:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:26:26,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-01 15:26:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:26,327 INFO L225 Difference]: With dead ends: 32 [2020-12-01 15:26:26,327 INFO L226 Difference]: Without dead ends: 20 [2020-12-01 15:26:26,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:26:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-01 15:26:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-01 15:26:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 15:26:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-01 15:26:26,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-12-01 15:26:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:26,341 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-01 15:26:26,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:26:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-01 15:26:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:26:26,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:26,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:26,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:26,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 829392807, now seen corresponding path program 2 times [2020-12-01 15:26:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:26,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645020620] [2020-12-01 15:26:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:26,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:26,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834087956] [2020-12-01 15:26:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:26,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 15:26:26,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:26:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:26:26,692 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:26:26,774 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:26:26,774 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:26:26,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:27,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:26:27 BoogieIcfgContainer [2020-12-01 15:26:27,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:26:27,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:26:27,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:26:27,013 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:26:27,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:22" (3/4) ... [2020-12-01 15:26:27,015 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:26:27,067 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_20fb04b2-473e-4081-821e-2458238b9e28/bin/uautomizer/witness.graphml [2020-12-01 15:26:27,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:26:27,069 INFO L168 Benchmark]: Toolchain (without parser) took 5117.45 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 71.0 MB in the beginning and 44.9 MB in the end (delta: 26.0 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,070 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory is still 47.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:26:27,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 92.3 MB. Free memory was 70.7 MB in the beginning and 61.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 92.3 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,071 INFO L168 Benchmark]: Boogie Preprocessor took 34.92 ms. Allocated memory is still 92.3 MB. Free memory was 59.4 MB in the beginning and 58.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:26:27,072 INFO L168 Benchmark]: RCFGBuilder took 310.80 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 69.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,073 INFO L168 Benchmark]: TraceAbstraction took 4400.17 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 68.9 MB in the beginning and 48.0 MB in the end (delta: 20.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,073 INFO L168 Benchmark]: Witness Printer took 54.83 ms. Allocated memory is still 113.2 MB. Free memory was 48.0 MB in the beginning and 44.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:26:27,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory is still 47.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 92.3 MB. Free memory was 70.7 MB in the beginning and 61.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 92.3 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.92 ms. Allocated memory is still 92.3 MB. Free memory was 59.4 MB in the beginning and 58.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.80 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 69.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4400.17 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 68.9 MB in the beginning and 48.0 MB in the end (delta: 20.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. * Witness Printer took 54.83 ms. Allocated memory is still 113.2 MB. Free memory was 48.0 MB in the beginning and 44.9 MB in the end (delta: 3.1 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: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=3] [L7] __assert_fail("0", "bresenham-ll.c", 7, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 82 SDslu, 205 SDs, 0 SdLazy, 256 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, 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, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 6873 SizeOfPredicates, 52 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 10/24 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...