./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8b3f04ec92be96a6d3b17ca538a3be31737a820 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:46:48,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:46:48,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:46:48,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:46:48,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:46:48,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:46:48,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:46:48,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:46:48,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:46:48,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:46:48,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:46:48,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:46:48,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:46:48,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:46:48,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:46:48,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:46:48,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:46:48,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:46:48,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:46:48,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:46:48,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:46:48,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:46:48,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:46:48,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:46:48,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:46:48,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:46:48,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:46:48,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:46:48,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:46:48,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:46:48,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:46:48,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:46:48,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:46:48,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:46:48,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:46:48,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:46:48,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:46:48,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:46:48,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:46:48,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:46:48,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:46:48,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:46:48,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:46:48,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:46:48,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:46:48,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:46:48,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:46:48,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:46:48,272 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:46:48,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:46:48,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:46:48,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:46:48,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:46:48,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:46:48,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:46:48,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:46:48,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:46:48,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:46:48,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:46:48,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:46:48,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:46:48,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:46:48,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:46:48,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:46:48,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:46:48,283 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8b3f04ec92be96a6d3b17ca538a3be31737a820 [2021-08-26 07:46:48,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:46:48,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:46:48,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:46:48,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:46:48,503 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:46:48,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-08-26 07:46:48,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0a05ff7/f0bb1a2811ca4ff1ab6f650fd9181336/FLAG9c45f3083 [2021-08-26 07:46:48,901 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:46:48,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-08-26 07:46:48,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0a05ff7/f0bb1a2811ca4ff1ab6f650fd9181336/FLAG9c45f3083 [2021-08-26 07:46:48,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe0a05ff7/f0bb1a2811ca4ff1ab6f650fd9181336 [2021-08-26 07:46:48,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:46:48,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:46:48,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:46:48,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:46:48,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:46:48,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:46:48" (1/1) ... [2021-08-26 07:46:48,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645dd66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:48, skipping insertion in model container [2021-08-26 07:46:48,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:46:48" (1/1) ... [2021-08-26 07:46:48,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:46:48,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:46:49,052 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2021-08-26 07:46:49,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:46:49,071 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:46:49,081 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c[537,550] [2021-08-26 07:46:49,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:46:49,113 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:46:49,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49 WrapperNode [2021-08-26 07:46:49,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:46:49,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:46:49,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:46:49,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:46:49,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:46:49,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:46:49,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:46:49,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:46:49,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:46:49,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:46:49,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:46:49,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:46:49,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (1/1) ... [2021-08-26 07:46:49,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:46:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:49,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 07:46:49,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 07:46:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:46:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:46:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:46:49,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:46:49,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:46:49,467 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-26 07:46:49,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:49 BoogieIcfgContainer [2021-08-26 07:46:49,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:46:49,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:46:49,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:46:49,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:46:49,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:46:48" (1/3) ... [2021-08-26 07:46:49,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db9bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:46:49, skipping insertion in model container [2021-08-26 07:46:49,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:46:49" (2/3) ... [2021-08-26 07:46:49,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db9bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:46:49, skipping insertion in model container [2021-08-26 07:46:49,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:49" (3/3) ... [2021-08-26 07:46:49,473 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2021-08-26 07:46:49,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:46:49,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 07:46:49,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:46:49,530 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 07:46:49,530 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 07:46:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:46:49,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:49,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:49,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-08-26 07:46:49,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:49,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705004946] [2021-08-26 07:46:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:49,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:49,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:49,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705004946] [2021-08-26 07:46:49,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705004946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:49,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:49,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:46:49,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868891680] [2021-08-26 07:46:49,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:46:49,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:46:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:46:49,684 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:49,693 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-08-26 07:46:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:46:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 07:46:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:49,699 INFO L225 Difference]: With dead ends: 37 [2021-08-26 07:46:49,699 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 07:46:49,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:46:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 07:46:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 07:46:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-26 07:46:49,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-08-26 07:46:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:49,719 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-26 07:46:49,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-26 07:46:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:46:49,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:49,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:49,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:46:49,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 07:46:49,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:49,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668165933] [2021-08-26 07:46:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:49,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:49,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:49,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82187925] [2021-08-26 07:46:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:49,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:49,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:49,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:49,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 07:46:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:46:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:49,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:49,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668165933] [2021-08-26 07:46:49,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:49,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82187925] [2021-08-26 07:46:49,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82187925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:49,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:49,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:46:49,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48070710] [2021-08-26 07:46:49,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:46:49,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:46:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:46:49,920 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:49,994 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-26 07:46:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:46:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 07:46:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:49,995 INFO L225 Difference]: With dead ends: 33 [2021-08-26 07:46:49,995 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 07:46:49,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:46:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 07:46:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-08-26 07:46:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-26 07:46:49,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-08-26 07:46:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:49,999 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-26 07:46:49,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-26 07:46:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 07:46:49,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:49,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:50,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 07:46:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:50,209 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-08-26 07:46:50,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:50,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370232448] [2021-08-26 07:46:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:50,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:50,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459452742] [2021-08-26 07:46:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:50,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:50,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:50,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 07:46:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:50,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 07:46:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:50,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370232448] [2021-08-26 07:46:50,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459452742] [2021-08-26 07:46:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459452742] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:50,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:50,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:46:50,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739275353] [2021-08-26 07:46:50,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:46:50,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:46:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:46:50,327 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:50,335 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-26 07:46:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:46:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 07:46:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:50,336 INFO L225 Difference]: With dead ends: 23 [2021-08-26 07:46:50,336 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 07:46:50,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:46:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 07:46:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 07:46:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-26 07:46:50,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-08-26 07:46:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-26 07:46:50,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-26 07:46:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:46:50,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:50,339 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:50,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:50,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 07:46:50,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1415763136, now seen corresponding path program 1 times [2021-08-26 07:46:50,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:50,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077262223] [2021-08-26 07:46:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:50,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:50,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860371849] [2021-08-26 07:46:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:50,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:50,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 07:46:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:46:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:50,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:50,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077262223] [2021-08-26 07:46:50,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:50,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860371849] [2021-08-26 07:46:50,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860371849] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:46:50,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:46:50,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 07:46:50,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286555703] [2021-08-26 07:46:50,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:46:50,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:46:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:46:50,703 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:50,760 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-08-26 07:46:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:46:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 07:46:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:50,761 INFO L225 Difference]: With dead ends: 26 [2021-08-26 07:46:50,761 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 07:46:50,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:46:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 07:46:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-26 07:46:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-26 07:46:50,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-08-26 07:46:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:50,771 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-26 07:46:50,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-26 07:46:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:46:50,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:50,772 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:50,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:50,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:50,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:50,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-08-26 07:46:50,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:50,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643796041] [2021-08-26 07:46:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:50,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:50,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449416369] [2021-08-26 07:46:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:50,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:50,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:50,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 07:46:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:46:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 07:46:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:46:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:46:51,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:46:51,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643796041] [2021-08-26 07:46:51,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:46:51,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449416369] [2021-08-26 07:46:51,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449416369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:46:51,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:46:51,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 07:46:51,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402191698] [2021-08-26 07:46:51,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:46:51,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:46:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:46:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:46:51,125 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:46:51,145 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-08-26 07:46:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:46:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 07:46:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:46:51,146 INFO L225 Difference]: With dead ends: 28 [2021-08-26 07:46:51,146 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 07:46:51,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:46:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 07:46:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 07:46:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-08-26 07:46:51,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-08-26 07:46:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:46:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-08-26 07:46:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:46:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-08-26 07:46:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:46:51,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:46:51,152 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:46:51,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:51,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:51,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:46:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:46:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-08-26 07:46:51,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:46:51,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11497867] [2021-08-26 07:46:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:51,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:46:51,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:46:51,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018507546] [2021-08-26 07:46:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:46:51,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:46:51,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:46:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 07:46:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:46:51,438 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 07:46:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:46:51,464 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 07:46:51,464 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 07:46:51,465 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:46:51,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:46:51,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 07:46:51,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:46:51,681 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:46:51,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:46:51 BoogieIcfgContainer [2021-08-26 07:46:51,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:46:51,697 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:46:51,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:46:51,698 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:46:51,698 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:46:49" (3/4) ... [2021-08-26 07:46:51,699 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 07:46:51,722 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:46:51,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:46:51,723 INFO L168 Benchmark]: Toolchain (without parser) took 2800.62 ms. Allocated memory was 52.4 MB in the beginning and 88.1 MB in the end (delta: 35.7 MB). Free memory was 29.6 MB in the beginning and 32.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,723 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.6 MB in the beginning and 34.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:46:51,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.86 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.3 MB in the beginning and 57.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.52 ms. Allocated memory is still 73.4 MB. Free memory was 57.7 MB in the beginning and 56.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,724 INFO L168 Benchmark]: Boogie Preprocessor took 33.33 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 55.1 MB in the end (delta: 933.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:46:51,724 INFO L168 Benchmark]: RCFGBuilder took 282.51 ms. Allocated memory is still 73.4 MB. Free memory was 54.8 MB in the beginning and 41.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,725 INFO L168 Benchmark]: TraceAbstraction took 2227.66 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 35.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,725 INFO L168 Benchmark]: Witness Printer took 24.85 ms. Allocated memory is still 88.1 MB. Free memory was 35.1 MB in the beginning and 32.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:46:51,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.6 MB in the beginning and 34.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 190.86 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.3 MB in the beginning and 57.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.52 ms. Allocated memory is still 73.4 MB. Free memory was 57.7 MB in the beginning and 56.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.33 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 55.1 MB in the end (delta: 933.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 282.51 ms. Allocated memory is still 73.4 MB. Free memory was 54.8 MB in the beginning and 41.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2227.66 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 35.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Witness Printer took 24.85 ms. Allocated memory is still 88.1 MB. Free memory was 35.1 MB in the beginning and 32.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L13] COND TRUE !(cond) VAL [counter=2] [L15] reach_error() VAL [counter=2] - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2157.5ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 7.7ms, AutomataDifference: 201.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 68 SDslu, 72 SDs, 0 SdLazy, 59 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.4ms SsaConstructionTime, 89.0ms SatisfiabilityAnalysisTime, 339.6ms InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 SizeOfPredicates, 10 NumberOfNonLiveVariables, 284 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 07:46:51,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...