./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/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 9b0351f59575b428612db43c0ef3ca767b3ff2c0 ............................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/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 9b0351f59575b428612db43c0ef3ca767b3ff2c0 ...................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 19:09:48,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:09:48,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:09:48,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:09:48,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:09:48,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:09:48,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:09:48,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:09:48,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:09:48,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:09:48,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:09:48,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:09:48,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:09:48,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:09:48,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:09:48,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:09:48,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:09:48,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:09:48,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:09:48,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:09:48,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:09:48,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:09:48,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:09:48,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:09:48,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:09:48,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:09:48,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:09:48,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:09:48,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:09:48,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:09:48,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:09:48,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:09:48,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:09:48,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:09:48,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:09:48,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:09:48,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:09:48,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:09:48,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:09:48,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:09:48,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:09:48,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:09:48,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:09:48,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:09:48,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:09:48,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:09:48,737 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:09:48,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:09:48,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:09:48,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:09:48,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:09:48,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:09:48,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:09:48,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:09:48,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:09:48,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:09:48,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:09:48,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:09:48,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:09:48,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:09:48,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:09:48,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:09:48,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:09:48,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:48,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:09:48,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:09:48,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:09:48,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:09:48,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:09:48,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:09:48,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:09:48,746 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_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b0351f59575b428612db43c0ef3ca767b3ff2c0 [2020-11-29 19:09:49,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:09:49,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:09:49,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:09:49,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:09:49,123 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:09:49,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c [2020-11-29 19:09:49,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/e32f09e8e/46a54e4999924d168a72b434350456c9/FLAG2517c86d3 [2020-11-29 19:09:49,851 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:09:49,852 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c [2020-11-29 19:09:49,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/e32f09e8e/46a54e4999924d168a72b434350456c9/FLAG2517c86d3 [2020-11-29 19:09:50,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/e32f09e8e/46a54e4999924d168a72b434350456c9 [2020-11-29 19:09:50,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:09:50,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:09:50,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:50,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:09:50,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:09:50,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3157ee34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50, skipping insertion in model container [2020-11-29 19:09:50,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:09:50,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:09:50,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:50,538 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:09:50,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:50,592 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:09:50,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50 WrapperNode [2020-11-29 19:09:50,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:50,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:50,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:09:50,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:09:50,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:50,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:09:50,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:09:50,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:09:50,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... [2020-11-29 19:09:50,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:09:50,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:09:50,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:09:50,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:09:50,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:50,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:09:50,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:09:50,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:09:50,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:09:51,115 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:09:51,115 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 19:09:51,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:51 BoogieIcfgContainer [2020-11-29 19:09:51,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:09:51,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:09:51,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:09:51,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:09:51,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:09:50" (1/3) ... [2020-11-29 19:09:51,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e9832c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:09:51, skipping insertion in model container [2020-11-29 19:09:51,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:50" (2/3) ... [2020-11-29 19:09:51,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e9832c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:09:51, skipping insertion in model container [2020-11-29 19:09:51,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:51" (3/3) ... [2020-11-29 19:09:51,148 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound1.c [2020-11-29 19:09:51,162 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:09:51,168 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:09:51,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:09:51,254 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:09:51,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:09:51,255 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:09:51,255 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:09:51,255 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:09:51,256 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:09:51,256 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:09:51,256 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:09:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 19:09:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:09:51,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:09:51,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:09:51,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:09:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:09:51,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:51,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903902398] [2020-11-29 19:09:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:51,434 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:51,464 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:51,505 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:51,506 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:09:51,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:09:51,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:09:51 BoogieIcfgContainer [2020-11-29 19:09:51,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:09:51,560 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:09:51,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:09:51,560 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:09:51,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:51" (3/4) ... [2020-11-29 19:09:51,567 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:09:51,567 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:09:51,572 INFO L168 Benchmark]: Toolchain (without parser) took 1344.98 ms. Allocated memory is still 90.2 MB. Free memory was 58.4 MB in the beginning and 40.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:51,575 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:51,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.20 ms. Allocated memory is still 90.2 MB. Free memory was 58.1 MB in the beginning and 67.2 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:51,579 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 65.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:51,580 INFO L168 Benchmark]: Boogie Preprocessor took 38.90 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 64.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:51,582 INFO L168 Benchmark]: RCFGBuilder took 429.06 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 53.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:51,583 INFO L168 Benchmark]: TraceAbstraction took 437.89 ms. Allocated memory is still 90.2 MB. Free memory was 52.6 MB in the beginning and 40.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:51,584 INFO L168 Benchmark]: Witness Printer took 8.16 ms. Allocated memory is still 90.2 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:51,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.20 ms. Allocated memory is still 90.2 MB. Free memory was 58.1 MB in the beginning and 67.2 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 65.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.90 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 64.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 429.06 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 53.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 437.89 ms. Allocated memory is still 90.2 MB. Free memory was 52.6 MB in the beginning and 40.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 8.16 ms. Allocated memory is still 90.2 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<1 [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire1.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:09:54,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:09:54,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:09:54,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:09:54,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:09:54,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:09:54,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:09:54,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:09:54,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:09:54,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:09:54,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:09:54,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:09:54,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:09:54,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:09:54,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:09:54,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:09:54,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:09:54,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:09:54,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:09:54,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:09:54,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:09:54,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:09:54,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:09:54,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:09:54,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:09:54,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:09:54,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:09:54,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:09:54,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:09:54,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:09:54,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:09:54,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:09:54,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:09:54,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:09:54,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:09:54,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:09:54,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:09:54,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:09:54,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:09:54,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:09:54,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:09:54,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 19:09:54,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:09:54,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:09:54,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:09:54,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:09:54,986 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:09:54,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:09:54,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:09:54,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:09:54,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:09:54,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:09:54,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:09:54,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:09:54,989 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:09:54,989 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:09:54,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:09:54,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:09:54,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:09:54,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:09:54,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:09:54,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:09:54,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:09:54,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:09:54,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:54,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:09:54,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:09:54,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:09:54,993 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:09:54,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:09:54,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:09:54,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:09:54,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:09:54,994 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b0351f59575b428612db43c0ef3ca767b3ff2c0 [2020-11-29 19:09:55,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:09:55,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:09:55,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:09:55,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:09:55,507 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:09:55,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c [2020-11-29 19:09:55,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/13f38e196/a251a714e932470493ac1600a020703d/FLAG4812cd028 [2020-11-29 19:09:56,346 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:09:56,347 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound1.c [2020-11-29 19:09:56,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/13f38e196/a251a714e932470493ac1600a020703d/FLAG4812cd028 [2020-11-29 19:09:56,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/data/13f38e196/a251a714e932470493ac1600a020703d [2020-11-29 19:09:56,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:09:56,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:09:56,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:56,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:09:56,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:09:56,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:56,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37709d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56, skipping insertion in model container [2020-11-29 19:09:56,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:56,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:09:56,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:09:56,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:56,933 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:09:56,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:56,993 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:09:56,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56 WrapperNode [2020-11-29 19:09:56,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:56,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:56,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:09:56,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:09:57,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:57,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:09:57,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:09:57,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:09:57,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... [2020-11-29 19:09:57,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:09:57,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:09:57,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:09:57,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:09:57,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:09:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:09:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:09:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:09:57,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:10:02,506 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:10:02,507 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 19:10:02,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:02 BoogieIcfgContainer [2020-11-29 19:10:02,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:10:02,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:10:02,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:10:02,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:10:02,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:09:56" (1/3) ... [2020-11-29 19:10:02,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e7546d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:02, skipping insertion in model container [2020-11-29 19:10:02,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:56" (2/3) ... [2020-11-29 19:10:02,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e7546d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:02, skipping insertion in model container [2020-11-29 19:10:02,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:02" (3/3) ... [2020-11-29 19:10:02,522 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound1.c [2020-11-29 19:10:02,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:10:02,544 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:10:02,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:10:02,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:10:02,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:10:02,613 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:10:02,613 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:10:02,614 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:10:02,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:10:02,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:10:02,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:10:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 19:10:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:10:02,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:10:02,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:10:02,640 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:10:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:10:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:10:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:10:02,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118327269] [2020-11-29 19:10:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 19:10:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:10:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:10:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:10:10,342 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 13 [2020-11-29 19:10:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:10:11,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:10:14,458 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-11-29 19:10:16,527 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-11-29 19:10:18,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from false [2020-11-29 19:10:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:10:20,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118327269] [2020-11-29 19:10:20,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:10:20,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-29 19:10:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391856349] [2020-11-29 19:10:20,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:10:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:10:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:10:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=21, Unknown=3, NotChecked=18, Total=56 [2020-11-29 19:10:20,623 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 8 states. [2020-11-29 19:10:23,463 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32)))) is different from false [2020-11-29 19:10:25,517 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32)))) is different from true [2020-11-29 19:10:28,742 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_currentRoundingMode roundNearestTiesToEven) (= (_ bv0 32) c_ULTIMATE.start_main_~r~0)) is different from true [2020-11-29 19:10:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:10:42,374 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2020-11-29 19:10:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:10:42,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2020-11-29 19:10:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:10:42,386 INFO L225 Difference]: With dead ends: 33 [2020-11-29 19:10:42,386 INFO L226 Difference]: Without dead ends: 14 [2020-11-29 19:10:42,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=22, Invalid=30, Unknown=6, NotChecked=52, Total=110 [2020-11-29 19:10:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-29 19:10:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2020-11-29 19:10:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:10:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 19:10:42,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-11-29 19:10:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:10:42,439 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:10:42,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:10:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-29 19:10:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 19:10:42,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:10:42,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:10:42,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:10:42,657 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:10:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:10:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1806863068, now seen corresponding path program 1 times [2020-11-29 19:10:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:10:42,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419399074] [2020-11-29 19:10:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 19:10:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:10:43,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:10:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:10:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:10:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:10:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:10:43,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419399074] [2020-11-29 19:10:43,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:10:43,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 19:10:43,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855520701] [2020-11-29 19:10:43,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:10:43,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:10:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:10:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:10:43,300 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 6 states. [2020-11-29 19:10:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:10:46,150 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-29 19:10:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:10:46,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-29 19:10:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:10:46,152 INFO L225 Difference]: With dead ends: 16 [2020-11-29 19:10:46,153 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 19:10:46,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:10:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 19:10:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 19:10:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:10:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 19:10:46,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-11-29 19:10:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:10:46,160 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:10:46,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:10:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-29 19:10:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:10:46,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:10:46,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:10:46,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:10:46,363 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:10:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:10:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1275448533, now seen corresponding path program 1 times [2020-11-29 19:10:46,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:10:46,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159570187] [2020-11-29 19:10:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 19:10:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:10:46,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:10:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:10:48,935 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from false [2020-11-29 19:10:51,004 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from true [2020-11-29 19:10:51,017 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:10:51,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:10:53,089 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-11-29 19:10:55,184 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-11-29 19:10:55,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:11:01,437 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-11-29 19:11:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:11:01,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:11:03,549 WARN L838 $PredicateComparison]: unable to prove that (or (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) is different from false [2020-11-29 19:11:05,616 WARN L860 $PredicateComparison]: unable to prove that (or (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) is different from true [2020-11-29 19:11:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:11:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159570187] [2020-11-29 19:11:05,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:11:05,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-11-29 19:11:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480858137] [2020-11-29 19:11:05,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:11:05,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:11:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:11:05,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=4, Unknown=7, NotChecked=20, Total=42 [2020-11-29 19:11:05,641 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 7 states. [2020-11-29 19:11:09,924 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))))) (.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (and (or (and (not .cse0) .cse1) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) (or .cse0 .cse1))) is different from false [2020-11-29 19:11:11,996 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))))) (.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (and (or (and (not .cse0) .cse1) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) (or .cse0 .cse1))) is different from true [2020-11-29 19:11:14,094 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (not (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-11-29 19:11:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:11:16,326 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-29 19:11:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:11:16,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-11-29 19:11:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:11:16,329 INFO L225 Difference]: With dead ends: 16 [2020-11-29 19:11:16,329 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 19:11:16,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=15, Invalid=5, Unknown=10, NotChecked=42, Total=72 [2020-11-29 19:11:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 19:11:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 19:11:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:11:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-29 19:11:16,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-11-29 19:11:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:11:16,336 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-29 19:11:16,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:11:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-29 19:11:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:11:16,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:11:16,337 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:11:16,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 19:11:16,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:11:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:11:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1673782672, now seen corresponding path program 1 times [2020-11-29 19:11:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:11:16,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448333493] [2020-11-29 19:11:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 19:11:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:11:26,027 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:11:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:11:40,631 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:11:40,763 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:11:40,763 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:11:40,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 19:11:40,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:11:40 BoogieIcfgContainer [2020-11-29 19:11:40,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:11:40,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:11:40,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:11:40,998 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:11:40,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:02" (3/4) ... [2020-11-29 19:11:41,001 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:11:41,083 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bcb2bc5f-cdae-4f17-a479-fe5b96d3c1ab/bin/uautomizer/witness.graphml [2020-11-29 19:11:41,088 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:11:41,092 INFO L168 Benchmark]: Toolchain (without parser) took 104415.95 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 50.8 MB in the beginning and 59.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,094 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 67.1 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:11:41,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.94 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 51.0 MB in the end (delta: -186.9 kB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.43 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,096 INFO L168 Benchmark]: Boogie Preprocessor took 36.62 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:11:41,097 INFO L168 Benchmark]: RCFGBuilder took 5406.68 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 35.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,100 INFO L168 Benchmark]: TraceAbstraction took 98485.04 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 35.5 MB in the beginning and 61.9 MB in the end (delta: -26.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,102 INFO L168 Benchmark]: Witness Printer took 93.37 ms. Allocated memory is still 81.8 MB. Free memory was 61.9 MB in the beginning and 59.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:11:41,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 67.1 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.94 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 51.0 MB in the end (delta: -186.9 kB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.43 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.62 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5406.68 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 35.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 98485.04 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 35.5 MB in the beginning and 61.9 MB in the end (delta: -26.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * Witness Printer took 93.37 ms. Allocated memory is still 81.8 MB. Free memory was 61.9 MB in the beginning and 59.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<1 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x > r)) [L37] x = x - r [L38] r = r + 1 VAL [counter=1] [L32] EXPR counter++ VAL [counter=2] [L32] COND FALSE !(counter++<1) [L17] COND TRUE !(cond) VAL [counter=2] [L10] __assert_fail("0", "freire1.c", 10, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 98.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 35.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 21 SDslu, 47 SDs, 0 SdLazy, 23 SolverSat, 4 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 21.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 14.4s SatisfiabilityAnalysisTime, 32.5s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 2 QuantifiedInterpolants, 2659 SizeOfPredicates, 18 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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...