/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:56:36,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:56:36,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:56:36,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:56:36,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:56:36,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:56:36,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:56:36,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:56:36,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:56:36,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:56:36,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:56:36,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:56:36,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:56:36,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:56:36,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:56:36,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:56:36,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:56:36,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:56:36,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:56:36,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:56:36,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:56:36,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:56:36,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:56:36,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:56:36,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:56:36,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:56:36,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:56:36,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:56:36,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:56:36,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:56:36,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:56:36,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:56:36,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:56:36,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:56:36,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:56:36,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:56:36,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:56:36,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:56:36,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:56:36,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:56:36,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:56:36,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:56:36,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:56:36,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:56:36,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:56:36,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:56:36,369 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:56:36,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:56:36,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:56:36,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:56:36,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:56:36,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:56:36,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:56:36,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:56:36,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:56:36,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:56:36,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:56:36,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:56:36,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:56:36,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:56:36,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:56:36,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:56:36,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:56:36,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:56:36,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:56:36,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:56:36,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:56:36,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:56:36,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:56:36,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:56:36,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:56:36,964 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:56:36,965 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:56:36,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2020-12-22 04:56:37,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470903066/5b155909416645029414070c3d0d3f47/FLAGae355fa0c [2020-12-22 04:56:37,765 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:56:37,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2020-12-22 04:56:37,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470903066/5b155909416645029414070c3d0d3f47/FLAGae355fa0c [2020-12-22 04:56:38,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470903066/5b155909416645029414070c3d0d3f47 [2020-12-22 04:56:38,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:56:38,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:56:38,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:56:38,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:56:38,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:56:38,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b55cb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38, skipping insertion in model container [2020-12-22 04:56:38,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:56:38,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:56:38,300 WARN L226 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/sqrt1-ll.c[520,533] [2020-12-22 04:56:38,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:56:38,326 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:56:38,341 WARN L226 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/sqrt1-ll.c[520,533] [2020-12-22 04:56:38,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:56:38,366 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:56:38,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38 WrapperNode [2020-12-22 04:56:38,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:56:38,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:56:38,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:56:38,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:56:38,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:56:38,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:56:38,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:56:38,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:56:38,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... [2020-12-22 04:56:38,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:56:38,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:56:38,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:56:38,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:56:38,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:56:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:56:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:56:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:56:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:56:39,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:56:39,017 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 04:56:39,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:56:39 BoogieIcfgContainer [2020-12-22 04:56:39,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:56:39,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:56:39,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:56:39,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:56:39,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:56:38" (1/3) ... [2020-12-22 04:56:39,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ecbe99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:56:39, skipping insertion in model container [2020-12-22 04:56:39,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:56:38" (2/3) ... [2020-12-22 04:56:39,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ecbe99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:56:39, skipping insertion in model container [2020-12-22 04:56:39,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:56:39" (3/3) ... [2020-12-22 04:56:39,028 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2020-12-22 04:56:39,036 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:56:39,041 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 04:56:39,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 04:56:39,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:56:39,169 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:56:39,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:56:39,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:56:39,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:56:39,170 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:56:39,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:56:39,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:56:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-22 04:56:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:56:39,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:39,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:56:39,196 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-22 04:56:39,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:39,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373908642] [2020-12-22 04:56:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:39,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373908642] [2020-12-22 04:56:39,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:39,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:56:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023060759] [2020-12-22 04:56:39,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:56:39,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:56:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:56:39,473 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-12-22 04:56:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:39,641 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-12-22 04:56:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:56:39,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-22 04:56:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:39,654 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:56:39,654 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:56:39,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:56:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:56:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-12-22 04:56:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:56:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-22 04:56:39,701 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 5 [2020-12-22 04:56:39,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:39,701 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-22 04:56:39,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:56:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-22 04:56:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:56:39,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:39,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:39,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:56:39,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1810815341, now seen corresponding path program 1 times [2020-12-22 04:56:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:39,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514038616] [2020-12-22 04:56:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:39,720 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:39,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575006744] [2020-12-22 04:56:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:39,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:56:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514038616] [2020-12-22 04:56:39,918 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:39,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575006744] [2020-12-22 04:56:39,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:39,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:56:39,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903527923] [2020-12-22 04:56:39,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:56:39,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:56:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:56:39,922 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-12-22 04:56:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:40,085 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-22 04:56:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:56:40,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-22 04:56:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:40,090 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:56:40,091 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:56:40,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:56:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:56:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 04:56:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:56:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:56:40,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 7 [2020-12-22 04:56:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:40,114 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:56:40,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:56:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:56:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:56:40,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:40,115 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:40,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:56:40,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash -209387720, now seen corresponding path program 1 times [2020-12-22 04:56:40,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:40,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410509646] [2020-12-22 04:56:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:40,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:40,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069884395] [2020-12-22 04:56:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:56:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:40,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410509646] [2020-12-22 04:56:40,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:40,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069884395] [2020-12-22 04:56:40,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:40,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 04:56:40,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093637308] [2020-12-22 04:56:40,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:56:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:56:40,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:56:40,520 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 5 states. [2020-12-22 04:56:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:40,763 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-22 04:56:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:56:40,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 04:56:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:40,766 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:56:40,766 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:56:40,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:56:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:56:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-22 04:56:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:56:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-22 04:56:40,777 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 12 [2020-12-22 04:56:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:40,778 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-22 04:56:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:56:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-22 04:56:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:56:40,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:40,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:40,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:40,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:40,996 INFO L82 PathProgramCache]: Analyzing trace with hash 642019515, now seen corresponding path program 1 times [2020-12-22 04:56:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:40,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076078882] [2020-12-22 04:56:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:41,016 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:41,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124694198] [2020-12-22 04:56:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:56:41,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:41,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076078882] [2020-12-22 04:56:41,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:41,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124694198] [2020-12-22 04:56:41,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:56:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679768147] [2020-12-22 04:56:41,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:56:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:56:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:56:41,246 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2020-12-22 04:56:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:41,488 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:56:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:56:41,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:56:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:41,489 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:56:41,490 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:56:41,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:56:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:56:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:56:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:56:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:56:41,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 14 [2020-12-22 04:56:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:41,499 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:56:41,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:56:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:56:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:56:41,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:41,500 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-22 04:56:41,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:41,716 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1758476118, now seen corresponding path program 2 times [2020-12-22 04:56:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:41,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072281344] [2020-12-22 04:56:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:41,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:41,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516150081] [2020-12-22 04:56:41,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:41,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:56:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:56:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:41,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072281344] [2020-12-22 04:56:41,930 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:41,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516150081] [2020-12-22 04:56:41,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:41,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 04:56:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221319583] [2020-12-22 04:56:41,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:56:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:56:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:56:41,937 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 6 states. [2020-12-22 04:56:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:42,130 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:56:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:56:42,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 04:56:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:42,132 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:56:42,132 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:56:42,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:56:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:56:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-12-22 04:56:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:56:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-22 04:56:42,142 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 19 [2020-12-22 04:56:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:42,143 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-22 04:56:42,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:56:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-22 04:56:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:56:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:42,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-22 04:56:42,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:42,352 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1973246547, now seen corresponding path program 2 times [2020-12-22 04:56:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:42,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687415777] [2020-12-22 04:56:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:42,367 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:42,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280448297] [2020-12-22 04:56:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:42,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:56:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:56:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687415777] [2020-12-22 04:56:42,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280448297] [2020-12-22 04:56:42,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:42,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:56:42,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991507163] [2020-12-22 04:56:42,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:56:42,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:42,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:56:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:56:42,551 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2020-12-22 04:56:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:42,690 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:56:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:56:42,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-22 04:56:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:42,694 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:56:42,695 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:56:42,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:56:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:56:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-22 04:56:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:56:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-22 04:56:42,726 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 21 [2020-12-22 04:56:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:42,726 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-22 04:56:42,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:56:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-22 04:56:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:56:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:42,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-22 04:56:42,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:56:42,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2085769040, now seen corresponding path program 1 times [2020-12-22 04:56:42,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:42,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533719392] [2020-12-22 04:56:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:42,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:42,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009363588] [2020-12-22 04:56:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:56:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:43,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533719392] [2020-12-22 04:56:43,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009363588] [2020-12-22 04:56:43,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:43,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:56:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165360039] [2020-12-22 04:56:43,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:56:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:56:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:56:43,113 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 8 states. [2020-12-22 04:56:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:43,293 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-22 04:56:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:56:43,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-22 04:56:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:43,294 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:56:43,294 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:56:43,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:56:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:56:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-22 04:56:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:56:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:56:43,301 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 23 [2020-12-22 04:56:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:43,302 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:56:43,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:56:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:56:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:56:43,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:43,303 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-22 04:56:43,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:43,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1858525944, now seen corresponding path program 3 times [2020-12-22 04:56:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:43,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672631758] [2020-12-22 04:56:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:43,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:43,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632811670] [2020-12-22 04:56:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:43,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:56:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:56:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 04:56:43,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672631758] [2020-12-22 04:56:43,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:43,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632811670] [2020-12-22 04:56:43,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:43,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 04:56:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398568460] [2020-12-22 04:56:43,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:56:43,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:56:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:56:43,709 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 6 states. [2020-12-22 04:56:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:43,793 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:56:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:56:43,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-22 04:56:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:43,798 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:56:43,799 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:56:43,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:56:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:56:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:56:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:56:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:56:43,808 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 26 [2020-12-22 04:56:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:43,809 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:56:43,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:56:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:56:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:56:43,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:43,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-22 04:56:44,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:44,019 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -662807429, now seen corresponding path program 3 times [2020-12-22 04:56:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:44,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969645502] [2020-12-22 04:56:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:44,032 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:44,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587329273] [2020-12-22 04:56:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-22 04:56:44,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:56:44,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:56:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 04:56:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969645502] [2020-12-22 04:56:44,190 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:44,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587329273] [2020-12-22 04:56:44,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:44,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 04:56:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965278081] [2020-12-22 04:56:44,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:56:44,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:56:44,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:56:44,198 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 6 states. [2020-12-22 04:56:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:46,359 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:56:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:56:46,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-22 04:56:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:46,360 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:56:46,360 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:56:46,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:56:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:56:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:56:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:56:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:56:46,373 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 28 [2020-12-22 04:56:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:46,373 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:56:46,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:56:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:56:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:56:46,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:46,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-22 04:56:46,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:56:46,586 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1302623586, now seen corresponding path program 2 times [2020-12-22 04:56:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:46,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593621418] [2020-12-22 04:56:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:46,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:46,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371052562] [2020-12-22 04:56:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:46,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 04:56:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:56:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 04:56:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593621418] [2020-12-22 04:56:46,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371052562] [2020-12-22 04:56:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:46,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:56:46,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938474692] [2020-12-22 04:56:46,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:56:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:56:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:56:46,805 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 7 states. [2020-12-22 04:56:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:59,037 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:56:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:56:59,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-22 04:56:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:59,039 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:56:59,039 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:56:59,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:56:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:56:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:56:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:56:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:56:59,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 30 [2020-12-22 04:56:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:59,049 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:56:59,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:56:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:56:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:56:59,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:59,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:59,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:59,252 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -846301541, now seen corresponding path program 1 times [2020-12-22 04:56:59,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:59,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298431459] [2020-12-22 04:56:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:59,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:59,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461953303] [2020-12-22 04:56:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:56:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:59,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298431459] [2020-12-22 04:56:59,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:59,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461953303] [2020-12-22 04:56:59,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 04:56:59,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:59,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 04:56:59,399 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 04:56:59,399 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:56:59,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:59,642 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 04:56:59,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:56:59 BoogieIcfgContainer [2020-12-22 04:56:59,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:56:59,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:56:59,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:56:59,643 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:56:59,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:56:39" (3/4) ... [2020-12-22 04:56:59,650 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 04:56:59,650 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:56:59,654 INFO L168 Benchmark]: Toolchain (without parser) took 21536.12 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 130.0 MB in the beginning and 141.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:59,659 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:56:59,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.93 ms. Allocated memory is still 154.1 MB. Free memory was 129.9 MB in the beginning and 120.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:59,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.20 ms. Allocated memory is still 154.1 MB. Free memory was 120.1 MB in the beginning and 118.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:59,666 INFO L168 Benchmark]: Boogie Preprocessor took 25.52 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 117.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:59,667 INFO L168 Benchmark]: RCFGBuilder took 581.63 ms. Allocated memory is still 154.1 MB. Free memory was 117.4 MB in the beginning and 103.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:59,668 INFO L168 Benchmark]: TraceAbstraction took 20621.62 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 103.1 MB in the beginning and 142.1 MB in the end (delta: -38.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:56:59,671 INFO L168 Benchmark]: Witness Printer took 7.66 ms. Allocated memory is still 186.6 MB. Free memory was 142.1 MB in the beginning and 141.5 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:56:59,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.93 ms. Allocated memory is still 154.1 MB. Free memory was 129.9 MB in the beginning and 120.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.20 ms. Allocated memory is still 154.1 MB. Free memory was 120.1 MB in the beginning and 118.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.52 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 117.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.63 ms. Allocated memory is still 154.1 MB. Free memory was 117.4 MB in the beginning and 103.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20621.62 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 103.1 MB in the beginning and 142.1 MB in the end (delta: -38.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 7.66 ms. Allocated memory is still 186.6 MB. Free memory was 142.1 MB in the beginning and 141.5 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int n; [L22] long long a, s, t; [L23] n = __VERIFIER_nondet_int() [L25] a = 0 [L26] s = 1 [L27] t = 1 [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(s <= n)) [L38] a = a + 1 [L39] t = t + 2 [L40] s = s + t [L29] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L35] COND TRUE !(s <= n) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 20.4s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 219 SDslu, 423 SDs, 0 SdLazy, 667 SolverSat, 129 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 14.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 185 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 22272 SizeOfPredicates, 61 NumberOfNonLiveVariables, 714 ConjunctsInSsa, 194 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 92/150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...