./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.25-f470102 [2019-12-07 17:29:51,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:29:51,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:29:51,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:29:51,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:29:51,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:29:51,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:29:51,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:29:51,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:29:51,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:29:51,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:29:51,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:29:51,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:29:51,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:29:51,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:29:51,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:29:51,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:29:51,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:29:51,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:29:51,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:29:51,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:29:51,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:29:51,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:29:51,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:29:51,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:29:51,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:29:51,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:29:51,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:29:51,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:29:51,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:29:51,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:29:51,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:29:51,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:29:51,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:29:51,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:29:51,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:29:51,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:29:51,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:29:51,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:29:51,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:29:51,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:29:51,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:29:51,202 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:29:51,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:29:51,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:29:51,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:29:51,203 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:29:51,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:29:51,204 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:29:51,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:29:51,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:29:51,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:29:51,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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(__VERIFIER_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 -> de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 [2019-12-07 17:29:51,306 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:29:51,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:29:51,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:29:51,321 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:29:51,321 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:29:51,322 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifcompf.c [2019-12-07 17:29:51,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/data/eda413220/7bbbdfad6b764131bf1ff65f7c12ccfd/FLAG9071200b0 [2019-12-07 17:29:51,759 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:29:51,759 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/sv-benchmarks/c/array-fpi/ifcompf.c [2019-12-07 17:29:51,763 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/data/eda413220/7bbbdfad6b764131bf1ff65f7c12ccfd/FLAG9071200b0 [2019-12-07 17:29:51,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/data/eda413220/7bbbdfad6b764131bf1ff65f7c12ccfd [2019-12-07 17:29:51,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:29:51,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:29:51,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:29:51,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:29:51,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:29:51,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165689ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51, skipping insertion in model container [2019-12-07 17:29:51,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:29:51,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:29:51,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:29:51,937 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:29:51,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:29:51,961 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:29:51,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51 WrapperNode [2019-12-07 17:29:51,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:29:51,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:29:51,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:29:51,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:29:51,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:29:51,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:29:51,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:29:51,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:29:51,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:51,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:52,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:52,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... [2019-12-07 17:29:52,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:29:52,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:29:52,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:29:52,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:29:52,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:52,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:29:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:29:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:29:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:29:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:29:52,206 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:29:52,206 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-12-07 17:29:52,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:52 BoogieIcfgContainer [2019-12-07 17:29:52,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:29:52,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:29:52,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:29:52,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:29:52,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:29:51" (1/3) ... [2019-12-07 17:29:52,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405b9600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:29:52, skipping insertion in model container [2019-12-07 17:29:52,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:29:51" (2/3) ... [2019-12-07 17:29:52,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405b9600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:29:52, skipping insertion in model container [2019-12-07 17:29:52,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:52" (3/3) ... [2019-12-07 17:29:52,212 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2019-12-07 17:29:52,218 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:29:52,222 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:29:52,231 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:29:52,246 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:29:52,246 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:29:52,247 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:29:52,247 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:29:52,247 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:29:52,247 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:29:52,247 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:29:52,247 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:29:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-12-07 17:29:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:29:52,261 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:52,261 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:52,262 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 638964938, now seen corresponding path program 1 times [2019-12-07 17:29:52,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:52,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944601398] [2019-12-07 17:29:52,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:52,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944601398] [2019-12-07 17:29:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:52,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:29:52,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158075457] [2019-12-07 17:29:52,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:29:52,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:52,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:29:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:29:52,376 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-12-07 17:29:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:52,387 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-12-07 17:29:52,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:29:52,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-12-07 17:29:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:52,394 INFO L225 Difference]: With dead ends: 44 [2019-12-07 17:29:52,394 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 17:29:52,396 INFO L630 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 [2019-12-07 17:29:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 17:29:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-12-07 17:29:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 17:29:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-12-07 17:29:52,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2019-12-07 17:29:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:52,417 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-12-07 17:29:52,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:29:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-12-07 17:29:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:29:52,418 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:52,418 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:52,418 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash -953872449, now seen corresponding path program 1 times [2019-12-07 17:29:52,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:52,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930735327] [2019-12-07 17:29:52,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:52,431 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:52,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854601501] [2019-12-07 17:29:52,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:52,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:29:52,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:29:52,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930735327] [2019-12-07 17:29:52,498 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:52,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854601501] [2019-12-07 17:29:52,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:52,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:29:52,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82612902] [2019-12-07 17:29:52,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:29:52,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:29:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:29:52,500 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 3 states. [2019-12-07 17:29:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:52,532 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-12-07 17:29:52,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:29:52,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-12-07 17:29:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:52,533 INFO L225 Difference]: With dead ends: 39 [2019-12-07 17:29:52,533 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 17:29:52,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:29:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 17:29:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-12-07 17:29:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 17:29:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-12-07 17:29:52,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2019-12-07 17:29:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:52,537 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-12-07 17:29:52,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:29:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-12-07 17:29:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:29:52,538 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:52,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:52,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:52,739 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash 361112916, now seen corresponding path program 1 times [2019-12-07 17:29:52,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:52,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350112118] [2019-12-07 17:29:52,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:52,763 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:52,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354344121] [2019-12-07 17:29:52,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:52,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:29:52,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:29:52,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350112118] [2019-12-07 17:29:52,833 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:52,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354344121] [2019-12-07 17:29:52,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:52,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:29:52,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174240731] [2019-12-07 17:29:52,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:29:52,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:52,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:29:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:29:52,835 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2019-12-07 17:29:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:52,883 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-12-07 17:29:52,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:29:52,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 17:29:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:52,884 INFO L225 Difference]: With dead ends: 47 [2019-12-07 17:29:52,884 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 17:29:52,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:29:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 17:29:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-12-07 17:29:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 17:29:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-12-07 17:29:52,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2019-12-07 17:29:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:52,888 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-12-07 17:29:52,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:29:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-12-07 17:29:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 17:29:52,889 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:52,889 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:53,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:53,090 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1034367045, now seen corresponding path program 1 times [2019-12-07 17:29:53,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:53,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665016001] [2019-12-07 17:29:53,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:53,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:53,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441823496] [2019-12-07 17:29:53,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:53,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:29:53,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:53,222 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 17:29:53,223 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:53,226 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:53,226 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:53,226 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 17:29:53,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:29:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:29:53,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665016001] [2019-12-07 17:29:53,253 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:53,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441823496] [2019-12-07 17:29:53,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:53,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 17:29:53,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105442430] [2019-12-07 17:29:53,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 17:29:53,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:53,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 17:29:53,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:29:53,254 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-12-07 17:29:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:53,309 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-12-07 17:29:53,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 17:29:53,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-12-07 17:29:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:53,310 INFO L225 Difference]: With dead ends: 42 [2019-12-07 17:29:53,310 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 17:29:53,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:29:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 17:29:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2019-12-07 17:29:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 17:29:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-12-07 17:29:53,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2019-12-07 17:29:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:53,314 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-12-07 17:29:53,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 17:29:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-12-07 17:29:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 17:29:53,315 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:53,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:53,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:53,516 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 740640317, now seen corresponding path program 1 times [2019-12-07 17:29:53,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:53,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911720339] [2019-12-07 17:29:53,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:53,527 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:53,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705630497] [2019-12-07 17:29:53,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:53,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:29:53,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:29:53,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911720339] [2019-12-07 17:29:53,559 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:53,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705630497] [2019-12-07 17:29:53,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:29:53,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:29:53,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157330863] [2019-12-07 17:29:53,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:29:53,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:53,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:29:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:29:53,560 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 3 states. [2019-12-07 17:29:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:53,591 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2019-12-07 17:29:53,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:29:53,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-12-07 17:29:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:53,592 INFO L225 Difference]: With dead ends: 60 [2019-12-07 17:29:53,592 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 17:29:53,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:29:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 17:29:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-12-07 17:29:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 17:29:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-12-07 17:29:53,596 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2019-12-07 17:29:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:53,596 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-12-07 17:29:53,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:29:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-12-07 17:29:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 17:29:53,597 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:53,597 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:53,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:53,799 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:53,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1318744497, now seen corresponding path program 1 times [2019-12-07 17:29:53,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:53,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512850694] [2019-12-07 17:29:53,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:53,821 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:53,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633913979] [2019-12-07 17:29:53,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:53,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 17:29:53,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:29:53,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512850694] [2019-12-07 17:29:53,893 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:53,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633913979] [2019-12-07 17:29:53,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:29:53,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 17:29:53,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239234877] [2019-12-07 17:29:53,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 17:29:53,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:53,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 17:29:53,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:29:53,895 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2019-12-07 17:29:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:54,001 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-12-07 17:29:54,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 17:29:54,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-12-07 17:29:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:54,002 INFO L225 Difference]: With dead ends: 85 [2019-12-07 17:29:54,002 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 17:29:54,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:29:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 17:29:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-12-07 17:29:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 17:29:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-12-07 17:29:54,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2019-12-07 17:29:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:54,007 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-12-07 17:29:54,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 17:29:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-12-07 17:29:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 17:29:54,008 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:54,008 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:54,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:54,209 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 180948411, now seen corresponding path program 1 times [2019-12-07 17:29:54,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:54,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080008956] [2019-12-07 17:29:54,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:54,235 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:54,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456494499] [2019-12-07 17:29:54,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:29:54,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 17:29:54,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:54,295 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-12-07 17:29:54,295 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,299 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:54,299 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,299 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:4 [2019-12-07 17:29:54,311 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 17:29:54,312 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,316 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:54,316 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,317 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-12-07 17:29:54,417 INFO L343 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2019-12-07 17:29:54,418 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2019-12-07 17:29:54,419 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,460 INFO L614 ElimStorePlain]: treesize reduction 106, result has 38.0 percent of original size [2019-12-07 17:29:54,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:29:54,462 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,462 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2019-12-07 17:29:54,482 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-12-07 17:29:54,482 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,489 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:54,489 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,489 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-12-07 17:29:54,525 INFO L343 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2019-12-07 17:29:54,526 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2019-12-07 17:29:54,526 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:29:54,533 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:29:54,533 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 17:29:54,534 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:34 [2019-12-07 17:29:54,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:29:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 17:29:54,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080008956] [2019-12-07 17:29:54,621 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:54,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456494499] [2019-12-07 17:29:54,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:29:54,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-12-07 17:29:54,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504535981] [2019-12-07 17:29:54,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 17:29:54,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:54,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 17:29:54,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-07 17:29:54,622 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 14 states. [2019-12-07 17:29:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:54,892 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-12-07 17:29:54,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 17:29:54,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-12-07 17:29:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:54,893 INFO L225 Difference]: With dead ends: 66 [2019-12-07 17:29:54,894 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 17:29:54,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2019-12-07 17:29:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 17:29:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-12-07 17:29:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 17:29:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-12-07 17:29:54,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2019-12-07 17:29:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:54,900 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-12-07 17:29:54,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 17:29:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-12-07 17:29:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 17:29:54,901 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:54,901 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:55,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:55,102 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1220259761, now seen corresponding path program 2 times [2019-12-07 17:29:55,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:55,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177247472] [2019-12-07 17:29:55,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:55,132 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:55,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080291818] [2019-12-07 17:29:55,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/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 [2019-12-07 17:29:55,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:29:55,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:29:55,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 17:29:55,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:29:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 17:29:55,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177247472] [2019-12-07 17:29:55,232 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 17:29:55,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080291818] [2019-12-07 17:29:55,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:29:55,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-12-07 17:29:55,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866889514] [2019-12-07 17:29:55,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 17:29:55,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:29:55,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 17:29:55,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-12-07 17:29:55,233 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-12-07 17:29:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:29:55,355 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2019-12-07 17:29:55,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:29:55,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-12-07 17:29:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:29:55,357 INFO L225 Difference]: With dead ends: 114 [2019-12-07 17:29:55,358 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 17:29:55,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:29:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 17:29:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2019-12-07 17:29:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 17:29:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-12-07 17:29:55,364 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2019-12-07 17:29:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:29:55,364 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-12-07 17:29:55,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 17:29:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-12-07 17:29:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 17:29:55,366 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:29:55,366 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:29:55,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:55,567 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:29:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:29:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -279478169, now seen corresponding path program 3 times [2019-12-07 17:29:55,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:29:55,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570148084] [2019-12-07 17:29:55,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:29:55,602 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 17:29:55,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579416711] [2019-12-07 17:29:55,602 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:55,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 17:29:55,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-12-07 17:29:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:29:55,710 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:29:55,710 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:29:55,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:29:55,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:29:55 BoogieIcfgContainer [2019-12-07 17:29:55,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:29:55,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:29:55,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:29:55,963 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:29:55,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:29:52" (3/4) ... [2019-12-07 17:29:55,965 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:29:56,009 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_41ff638b-d8ad-4cb1-ac9c-00a1c974bf34/bin/uautomizer/witness.graphml [2019-12-07 17:29:56,009 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:29:56,010 INFO L168 Benchmark]: Toolchain (without parser) took 4235.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 942.5 MB in the beginning and 931.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 93.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,011 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:29:56,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -134.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:29:56,011 INFO L168 Benchmark]: Boogie Preprocessor took 17.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,011 INFO L168 Benchmark]: RCFGBuilder took 201.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,012 INFO L168 Benchmark]: TraceAbstraction took 3755.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 938.1 MB in the end (delta: 111.9 MB). Peak memory consumption was 111.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,012 INFO L168 Benchmark]: Witness Printer took 46.19 ms. Allocated memory is still 1.1 GB. Free memory was 938.1 MB in the beginning and 931.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:29:56,013 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 186.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -134.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 201.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3755.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 938.1 MB in the end (delta: 111.9 MB). Peak memory consumption was 111.9 MB. Max. memory is 11.5 GB. * Witness Printer took 46.19 ms. Allocated memory is still 1.1 GB. Free memory was 938.1 MB in the beginning and 931.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 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: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L25] long long *c = malloc(sizeof(long long)*N); [L27] i=0 VAL [N=3] [L27] COND TRUE i