/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:55:44,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:55:44,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:55:44,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:55:44,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:55:44,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:55:44,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:55:44,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:55:44,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:55:44,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:55:44,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:55:44,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:55:44,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:55:44,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:55:44,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:55:44,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:55:44,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:55:44,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:55:44,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:55:44,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:55:44,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:55:44,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:55:44,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:55:44,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:55:44,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:55:44,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:55:44,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:55:44,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:55:44,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:55:44,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:55:44,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:55:44,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:55:44,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:55:44,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:55:44,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:55:44,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:55:44,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:55:44,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:55:44,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:55:44,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:55:44,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:55:44,239 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:55:44,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:55:44,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:55:44,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:55:44,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:55:44,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:55:44,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:55:44,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:55:44,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:55:44,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:55:44,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:55:44,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:55:44,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:55:44,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:55:44,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:55:44,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:55:44,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:55:44,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:55:44,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:55:44,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:55:44,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:55:44,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:55:44,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:55:44,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:55:44,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:55:44,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:55:44,675 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:55:44,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prod4br-ll.c [2020-12-22 04:55:44,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c36dc10/474321faa2fa416193b4ebee08abfebf/FLAGced1e85e6 [2020-12-22 04:55:45,404 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:55:45,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/prod4br-ll.c [2020-12-22 04:55:45,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c36dc10/474321faa2fa416193b4ebee08abfebf/FLAGced1e85e6 [2020-12-22 04:55:45,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c36dc10/474321faa2fa416193b4ebee08abfebf [2020-12-22 04:55:45,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:55:45,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:55:45,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:55:45,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:55:45,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:55:45,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:45,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3751ab6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45, skipping insertion in model container [2020-12-22 04:55:45,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:45,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:55:45,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:55:45,919 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/prod4br-ll.c[524,537] [2020-12-22 04:55:45,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:55:45,950 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:55:45,965 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/prod4br-ll.c[524,537] [2020-12-22 04:55:45,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:55:45,992 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:55:45,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45 WrapperNode [2020-12-22 04:55:45,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:55:45,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:55:45,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:55:45,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:55:46,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:55:46,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:55:46,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:55:46,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:55:46,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (1/1) ... [2020-12-22 04:55:46,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:55:46,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:55:46,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:55:46,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:55:46,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (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 04:55:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:55:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:55:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:55:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:55:46,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:55:46,504 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 04:55:46,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:55:46 BoogieIcfgContainer [2020-12-22 04:55:46,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:55:46,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:55:46,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:55:46,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:55:46,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:55:45" (1/3) ... [2020-12-22 04:55:46,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4246d926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:55:46, skipping insertion in model container [2020-12-22 04:55:46,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:55:45" (2/3) ... [2020-12-22 04:55:46,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4246d926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:55:46, skipping insertion in model container [2020-12-22 04:55:46,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:55:46" (3/3) ... [2020-12-22 04:55:46,526 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2020-12-22 04:55:46,539 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:55:46,552 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 04:55:46,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 04:55:46,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:55:46,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:55:46,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:55:46,655 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:55:46,655 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:55:46,655 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:55:46,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:55:46,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:55:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 04:55:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:55:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:46,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:46,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 04:55:46,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:46,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270660734] [2020-12-22 04:55:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:46,956 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 04:55:46,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270660734] [2020-12-22 04:55:46,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:55:46,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:55:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514988149] [2020-12-22 04:55:46,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:55:46,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:55:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:55:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:55:46,992 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-22 04:55:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:55:47,017 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-12-22 04:55:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:55:47,018 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 04:55:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:55:47,052 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:55:47,053 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:55:47,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:55:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:55:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:55:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:55:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 04:55:47,098 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2020-12-22 04:55:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:55:47,099 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 04:55:47,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:55:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 04:55:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:55:47,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:47,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:47,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:55:47,101 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 04:55:47,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:47,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082334451] [2020-12-22 04:55:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:47,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:55:47,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608464561] [2020-12-22 04:55:47,155 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 04:55:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:47,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:55:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:55:47,388 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 04:55:47,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082334451] [2020-12-22 04:55:47,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:55:47,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608464561] [2020-12-22 04:55:47,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:55:47,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:55:47,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039684944] [2020-12-22 04:55:47,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:55:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:55:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:55:47,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:55:47,394 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-12-22 04:55:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:55:47,632 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-22 04:55:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:55:47,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-22 04:55:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:55:47,635 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:55:47,635 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:55:47,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:55:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:55:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2020-12-22 04:55:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:55:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-22 04:55:47,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2020-12-22 04:55:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:55:47,645 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-22 04:55:47,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:55:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-22 04:55:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:55:47,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:47,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:47,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:55:47,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1864211483, now seen corresponding path program 1 times [2020-12-22 04:55:47,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:47,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730005555] [2020-12-22 04:55:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:47,879 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:55:47,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385222053] [2020-12-22 04:55:47,879 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 04:55:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:55:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:55:48,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:55:48,350 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 04:55:48,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:55:48,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:55:48,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:55:48,479 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:55:48,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:55:48,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:55:48,548 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 04:55:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730005555] [2020-12-22 04:55:48,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:55:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385222053] [2020-12-22 04:55:48,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:55:48,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 04:55:48,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168156080] [2020-12-22 04:55:48,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:55:48,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:55:48,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:55:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:55:48,560 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2020-12-22 04:55:51,375 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 04:55:51,510 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-22 04:55:51,655 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-12-22 04:55:53,372 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 04:55:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:55:53,498 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-22 04:55:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:55:53,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-22 04:55:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:55:53,500 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:55:53,500 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:55:53,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:55:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:55:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-22 04:55:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:55:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-22 04:55:53,509 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2020-12-22 04:55:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:55:53,510 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-22 04:55:53,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:55:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-22 04:55:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:55:53,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:53,511 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:53,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:55:53,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1954678172, now seen corresponding path program 1 times [2020-12-22 04:55:53,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:53,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224835321] [2020-12-22 04:55:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:53,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:55:53,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624595061] [2020-12-22 04:55:53,749 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 04:55:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:55:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:55:53,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:55:53,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:55:54,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:55:56,064 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 04:55:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224835321] [2020-12-22 04:55:56,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:55:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624595061] [2020-12-22 04:55:56,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:55:56,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:55:56,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688416660] [2020-12-22 04:55:56,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:55:56,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:55:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:55:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:55:56,068 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 7 states. [2020-12-22 04:55:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:55:58,491 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-22 04:55:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:55:58,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 04:55:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:55:58,493 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:55:58,493 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:55:58,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:55:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:55:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-12-22 04:55:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:55:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-22 04:55:58,502 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2020-12-22 04:55:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:55:58,502 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-22 04:55:58,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:55:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-22 04:55:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:55:58,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:55:58,503 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:55:58,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:55:58,718 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:55:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:55:58,719 INFO L82 PathProgramCache]: Analyzing trace with hash -462951875, now seen corresponding path program 1 times [2020-12-22 04:55:58,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:55:58,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085451344] [2020-12-22 04:55:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:55:58,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:55:58,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380471523] [2020-12-22 04:55:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:55:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:55:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:55:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:03,061 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-22 04:56:03,133 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 04:56:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085451344] [2020-12-22 04:56:03,134 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380471523] [2020-12-22 04:56:03,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:03,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:56:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377045112] [2020-12-22 04:56:03,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:56:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:56:03,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:56:03,138 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 8 states. [2020-12-22 04:56:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:05,741 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-12-22 04:56:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:56:05,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 04:56:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:05,743 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:56:05,743 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:56:05,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:56:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:56:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-12-22 04:56:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:56:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-22 04:56:05,751 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2020-12-22 04:56:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:05,752 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-22 04:56:05,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:56:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-22 04:56:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:56:05,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:05,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:05,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:05,967 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1463868387, now seen corresponding path program 1 times [2020-12-22 04:56:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904470722] [2020-12-22 04:56:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:05,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:05,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313949364] [2020-12-22 04:56:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:56:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:56:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:10,286 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-22 04:56:10,359 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 04:56:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904470722] [2020-12-22 04:56:10,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:10,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313949364] [2020-12-22 04:56:10,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:10,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:56:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264546367] [2020-12-22 04:56:10,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:56:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:56:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:56:10,362 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 8 states. [2020-12-22 04:56:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:15,866 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-12-22 04:56:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:56:15,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 04:56:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:15,868 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:56:15,868 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:56:15,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:56:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:56:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2020-12-22 04:56:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:56:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-22 04:56:15,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2020-12-22 04:56:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:15,877 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-22 04:56:15,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:56:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-22 04:56:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:56:15,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:15,878 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:16,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:56:16,093 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1463927969, now seen corresponding path program 1 times [2020-12-22 04:56:16,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:16,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096367829] [2020-12-22 04:56:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:16,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:16,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036702057] [2020-12-22 04:56:16,106 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 04:56:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:16,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:56:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:16,409 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 04:56:16,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096367829] [2020-12-22 04:56:16,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:16,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036702057] [2020-12-22 04:56:16,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:56:16,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:56:16,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651534017] [2020-12-22 04:56:16,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:56:16,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:56:16,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:56:16,412 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2020-12-22 04:56:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:23,298 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-22 04:56:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:56:23,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 04:56:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:23,300 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:56:23,300 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:56:23,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:56:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:56:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-12-22 04:56:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:56:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-22 04:56:23,309 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 13 [2020-12-22 04:56:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:23,310 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-22 04:56:23,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:56:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-22 04:56:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:56:23,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:23,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:23,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:23,524 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash -645914224, now seen corresponding path program 1 times [2020-12-22 04:56:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:23,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352489393] [2020-12-22 04:56:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:23,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:23,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524522739] [2020-12-22 04:56:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:56:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:56:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:56:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:56:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352489393] [2020-12-22 04:56:23,695 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524522739] [2020-12-22 04:56:23,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:23,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:56:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481425711] [2020-12-22 04:56:23,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:56:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:56:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:56:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:56:23,697 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 6 states. [2020-12-22 04:56:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:56:23,892 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-12-22 04:56:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:56:23,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 04:56:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:56:23,893 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:56:23,893 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:56:23,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:56:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:56:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-12-22 04:56:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:56:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2020-12-22 04:56:23,905 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 14 [2020-12-22 04:56:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:56:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2020-12-22 04:56:23,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:56:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2020-12-22 04:56:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:56:23,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:56:23,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:56:24,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:56:24,117 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:56:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:56:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1452798489, now seen corresponding path program 2 times [2020-12-22 04:56:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:56:24,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086452775] [2020-12-22 04:56:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:56:24,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:56:24,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602499738] [2020-12-22 04:56:24,132 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 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 04:56:24,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:56:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:56:24,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:56:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:56:26,389 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~p~0 4) (<= 1 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~a~0 (div c_ULTIMATE.start_main_~x~0 2)) (= (mod c_ULTIMATE.start_main_~x~0 2) 0) (= c_ULTIMATE.start_main_~b~0 (div c_ULTIMATE.start_main_~y~0 2)) (= c_ULTIMATE.start_main_~q~0 0) (<= (mod c_ULTIMATE.start_main_~y~0 2) 0) (let ((.cse0 (= (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~p~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~q~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)) (and .cse0 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond))))) is different from false [2020-12-22 04:56:36,593 WARN L197 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-22 04:56:48,780 WARN L197 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-22 04:56:48,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086452775] [2020-12-22 04:56:48,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:56:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602499738] [2020-12-22 04:56:48,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 04:56:48,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:56:48,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 04:56:48,812 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 04:56:48,812 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:56:49,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:56:49,035 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 04:56:49,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:56:49 BoogieIcfgContainer [2020-12-22 04:56:49,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:56:49,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:56:49,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:56:49,036 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:56:49,037 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:55:46" (3/4) ... [2020-12-22 04:56:49,040 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 04:56:49,040 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:56:49,041 INFO L168 Benchmark]: Toolchain (without parser) took 63320.75 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.5 MB in the beginning and 71.8 MB in the end (delta: 54.7 MB). Peak memory consumption was 85.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,041 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:56:49,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.52 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.42 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,043 INFO L168 Benchmark]: Boogie Preprocessor took 27.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,044 INFO L168 Benchmark]: RCFGBuilder took 437.95 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 132.7 MB in the end (delta: -19.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,045 INFO L168 Benchmark]: TraceAbstraction took 62526.85 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.2 MB in the beginning and 72.3 MB in the end (delta: 59.9 MB). Peak memory consumption was 91.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:56:49,045 INFO L168 Benchmark]: Witness Printer took 3.97 ms. Allocated memory is still 181.4 MB. Free memory was 72.3 MB in the beginning and 71.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:56:49,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.52 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.42 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 437.95 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 132.7 MB in the end (delta: -19.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 62526.85 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.2 MB in the beginning and 72.3 MB in the end (delta: 59.9 MB). Peak memory consumption was 91.9 MB. Max. memory is 8.0 GB. * Witness Printer took 3.97 ms. Allocated memory is still 181.4 MB. Free memory was 72.3 MB in the beginning and 71.8 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: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 62.3s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 22.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 118 SDtfs, 458 SDslu, 257 SDs, 0 SdLazy, 476 SolverSat, 130 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 15.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 79 ConstructedInterpolants, 1 QuantifiedInterpolants, 8817 SizeOfPredicates, 65 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 3/11 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...