/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-scaling/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:40:47,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:40:47,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:40:47,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:40:47,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:40:47,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:40:47,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:40:47,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:40:47,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:40:47,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:40:47,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:40:47,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:40:47,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:40:47,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:40:47,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:40:47,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:40:47,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:40:47,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:40:47,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:40:47,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:40:47,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:40:47,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:40:47,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:40:47,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:40:47,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:40:47,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:40:47,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:40:47,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:40:47,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:40:47,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:40:47,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:40:47,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:40:47,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:40:47,650 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:40:47,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:40:47,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:40:47,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:40:47,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:40:47,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:40:47,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:40:47,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:40:47,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:40:47,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:40:47,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:40:47,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:40:47,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:40:47,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:47,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:40:47,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:40:47,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:40:47,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:40:47,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:40:47,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:40:47,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:40:47,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:40:48,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:40:48,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:40:48,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:40:48,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:40:48,087 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:40:48,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2020-12-22 05:40:48,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c19c/0367cd03a2fa4600850f9966e8bc4b9e/FLAG41f547d0a [2020-12-22 05:40:48,911 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:40:48,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2020-12-22 05:40:48,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c19c/0367cd03a2fa4600850f9966e8bc4b9e/FLAG41f547d0a [2020-12-22 05:40:49,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c19c/0367cd03a2fa4600850f9966e8bc4b9e [2020-12-22 05:40:49,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:40:49,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:40:49,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:49,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:40:49,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:40:49,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162f68b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49, skipping insertion in model container [2020-12-22 05:40:49,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:40:49,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:40:49,447 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-scaling/ps4-ll_valuebound20.c[458,471] [2020-12-22 05:40:49,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:49,478 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:40:49,494 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-scaling/ps4-ll_valuebound20.c[458,471] [2020-12-22 05:40:49,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:49,520 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:40:49,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49 WrapperNode [2020-12-22 05:40:49,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:49,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:49,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:40:49,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:40:49,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:49,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:40:49,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:40:49,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:40:49,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (1/1) ... [2020-12-22 05:40:49,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:40:49,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:40:49,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:40:49,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:40:49,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (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 05:40:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:40:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:40:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:40:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:40:50,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:40:50,075 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:40:50,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:50 BoogieIcfgContainer [2020-12-22 05:40:50,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:40:50,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:40:50,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:40:50,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:40:50,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:40:49" (1/3) ... [2020-12-22 05:40:50,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6594ffff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:50, skipping insertion in model container [2020-12-22 05:40:50,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:49" (2/3) ... [2020-12-22 05:40:50,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6594ffff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:50, skipping insertion in model container [2020-12-22 05:40:50,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:50" (3/3) ... [2020-12-22 05:40:50,090 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2020-12-22 05:40:50,099 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:40:50,105 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:40:50,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:40:50,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:40:50,198 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:40:50,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:40:50,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:40:50,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:40:50,199 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:40:50,199 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:40:50,199 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:40:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 05:40:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:40:50,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:50,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:50,224 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 05:40:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:50,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853747495] [2020-12-22 05:40:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:50,568 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 05:40:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853747495] [2020-12-22 05:40:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:40:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508305681] [2020-12-22 05:40:50,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:40:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:40:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:40:50,605 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-22 05:40:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:50,625 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-12-22 05:40:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:40:50,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:40:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:50,641 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:40:50,641 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 05:40:50,648 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 05:40:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 05:40:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 05:40:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 05:40:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 05:40:50,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2020-12-22 05:40:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:50,689 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 05:40:50,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:40:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 05:40:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:40:50,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:50,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:50,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:40:50,691 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 05:40:50,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184986064] [2020-12-22 05:40:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:50,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:50,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39095069] [2020-12-22 05:40:50,710 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 05:40:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:40:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:51,000 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 05:40:51,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184986064] [2020-12-22 05:40:51,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:51,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39095069] [2020-12-22 05:40:51,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:51,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:40:51,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169286852] [2020-12-22 05:40:51,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:40:51,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:40:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:51,019 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-12-22 05:40:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:51,265 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 05:40:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:40:51,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 05:40:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:51,268 INFO L225 Difference]: With dead ends: 31 [2020-12-22 05:40:51,268 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:40:51,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:40:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 05:40:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:40:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 05:40:51,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2020-12-22 05:40:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:51,290 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 05:40:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:40:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 05:40:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:40:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:51,293 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:51,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:40:51,507 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-22 05:40:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416345329] [2020-12-22 05:40:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:51,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:51,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546695812] [2020-12-22 05:40:51,543 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 05:40:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:40:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:51,763 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 05:40:51,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416345329] [2020-12-22 05:40:51,764 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546695812] [2020-12-22 05:40:51,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:51,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:40:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651769060] [2020-12-22 05:40:51,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:40:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:40:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:51,768 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-12-22 05:40:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:52,007 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 05:40:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:40:52,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:40:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:52,009 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:40:52,009 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:40:52,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:40:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:40:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-22 05:40:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 05:40:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-22 05:40:52,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2020-12-22 05:40:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:52,018 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-22 05:40:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:40:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-22 05:40:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:52,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:52,019 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:52,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:52,233 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-22 05:40:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:52,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004472561] [2020-12-22 05:40:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:52,251 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:52,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167764263] [2020-12-22 05:40:52,252 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 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 05:40:52,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:40:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:52,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004472561] [2020-12-22 05:40:52,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:52,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167764263] [2020-12-22 05:40:52,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:52,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:40:52,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139798000] [2020-12-22 05:40:52,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:40:52,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:52,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:40:52,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:52,588 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-12-22 05:40:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:52,757 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 05:40:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:40:52,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 05:40:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:52,759 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:40:52,759 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:40:52,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:40:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:40:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-22 05:40:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:40:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 05:40:52,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2020-12-22 05:40:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:52,768 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 05:40:52,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:40:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 05:40:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:52,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:52,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:52,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:52,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2020-12-22 05:40:52,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:52,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62417575] [2020-12-22 05:40:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:52,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:53,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401905408] [2020-12-22 05:40:53,000 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 05:40:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:40:53,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:53,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62417575] [2020-12-22 05:40:53,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:53,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401905408] [2020-12-22 05:40:53,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:53,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:40:53,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129349148] [2020-12-22 05:40:53,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:40:53,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:40:53,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:53,271 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-22 05:40:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:53,751 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-22 05:40:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:40:53,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 05:40:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:53,753 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:40:53,753 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:40:53,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:40:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:40:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:40:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:40:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 05:40:53,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2020-12-22 05:40:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:53,776 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 05:40:53,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:40:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 05:40:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:40:53,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:53,777 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:53,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:53,982 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-22 05:40:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:53,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363287636] [2020-12-22 05:40:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:54,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:54,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574534712] [2020-12-22 05:40:54,006 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 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