/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/hard-u_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:29:25,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:29:25,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:29:25,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:29:25,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:29:25,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:29:25,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:29:25,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:29:26,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:29:26,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:29:26,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:29:26,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:29:26,008 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:29:26,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:29:26,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:29:26,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:29:26,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:29:26,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:29:26,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:29:26,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:29:26,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:29:26,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:29:26,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:29:26,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:29:26,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:29:26,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:29:26,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:29:26,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:29:26,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:29:26,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:29:26,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:29:26,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:29:26,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:29:26,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:29:26,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:29:26,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:29:26,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:29:26,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:29:26,414 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:29:26,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound1.c [2020-12-22 05:29:26,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1028ead0b/b408af17a5534bcf9dae4d28fe85655a/FLAG144f1ff7a [2020-12-22 05:29:27,025 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:29:27,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound1.c [2020-12-22 05:29:27,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1028ead0b/b408af17a5534bcf9dae4d28fe85655a/FLAG144f1ff7a [2020-12-22 05:29:27,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1028ead0b/b408af17a5534bcf9dae4d28fe85655a [2020-12-22 05:29:27,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:29:27,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:29:27,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:29:27,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:29:27,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:29:27,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca15e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27, skipping insertion in model container [2020-12-22 05:29:27,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:29:27,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:29:27,590 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/hard-u_unwindbound1.c[537,550] [2020-12-22 05:29:27,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:29:27,619 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:29:27,633 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/hard-u_unwindbound1.c[537,550] [2020-12-22 05:29:27,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:29:27,659 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:29:27,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27 WrapperNode [2020-12-22 05:29:27,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:29:27,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:29:27,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:29:27,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:29:27,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:29:27,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:29:27,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:29:27,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:29:27,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (1/1) ... [2020-12-22 05:29:27,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:29:27,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:29:27,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:29:27,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:29:27,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (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 05:29:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:29:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:29:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:29:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:29:28,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:29:28,364 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-22 05:29:28,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:28 BoogieIcfgContainer [2020-12-22 05:29:28,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:29:28,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:29:28,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:29:28,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:29:28,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:29:27" (1/3) ... [2020-12-22 05:29:28,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e255a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:29:28, skipping insertion in model container [2020-12-22 05:29:28,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:27" (2/3) ... [2020-12-22 05:29:28,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e255a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:29:28, skipping insertion in model container [2020-12-22 05:29:28,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:28" (3/3) ... [2020-12-22 05:29:28,407 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound1.c [2020-12-22 05:29:28,414 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:29:28,422 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-22 05:29:28,448 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-22 05:29:28,476 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:29:28,476 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:29:28,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:29:28,476 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:29:28,477 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:29:28,477 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:29:28,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:29:28,477 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:29:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-22 05:29:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:29:28,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:28,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:28,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-22 05:29:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:28,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893632422] [2020-12-22 05:29:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:28,677 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 05:29:28,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893632422] [2020-12-22 05:29:28,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:28,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:29:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396594018] [2020-12-22 05:29:28,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:29:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:28,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:29:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:29:28,702 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-22 05:29:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:28,725 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-22 05:29:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:29:28,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:29:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:28,737 INFO L225 Difference]: With dead ends: 79 [2020-12-22 05:29:28,738 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:29:28,741 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 05:29:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:29:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:29:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:29:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 05:29:28,783 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-22 05:29:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:28,783 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 05:29:28,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:29:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 05:29:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:29:28,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:28,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:28,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:29:28,785 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:29:28,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:28,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341574835] [2020-12-22 05:29:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:28,939 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 05:29:28,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341574835] [2020-12-22 05:29:28,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:28,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:29:28,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472582136] [2020-12-22 05:29:28,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:28,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:28,946 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-22 05:29:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:29,131 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-22 05:29:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:29,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 05:29:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:29,135 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:29:29,135 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 05:29:29,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 05:29:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-22 05:29:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:29:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 05:29:29,161 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-22 05:29:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:29,161 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 05:29:29,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 05:29:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:29:29,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:29,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:29,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:29:29,167 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-22 05:29:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434996452] [2020-12-22 05:29:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:29,251 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 05:29:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434996452] [2020-12-22 05:29:29,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:29,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:29:29,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331237387] [2020-12-22 05:29:29,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:29,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:29,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:29,254 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-22 05:29:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:29,279 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-22 05:29:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:29:29,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 05:29:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:29,280 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:29:29,281 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:29:29,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:29:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:29:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:29:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 05:29:29,288 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-22 05:29:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:29,289 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 05:29:29,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 05:29:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:29:29,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:29,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:29,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:29:29,290 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-22 05:29:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:29,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444324029] [2020-12-22 05:29:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:29,384 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 05:29:29,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444324029] [2020-12-22 05:29:29,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:29,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:29:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195821661] [2020-12-22 05:29:29,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:29,387 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-22 05:29:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:29,533 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-22 05:29:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:29,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 05:29:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:29,535 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:29:29,535 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 05:29:29,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 05:29:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-22 05:29:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:29:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 05:29:29,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-22 05:29:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:29,544 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 05:29:29,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 05:29:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:29:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:29,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:29,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 05:29:29,546 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-22 05:29:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:29,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081817517] [2020-12-22 05:29:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:29,563 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:29,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266670716] [2020-12-22 05:29:29,564 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 05:29:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:29:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:29,825 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 05:29:29,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081817517] [2020-12-22 05:29:29,826 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266670716] [2020-12-22 05:29:29,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:29,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:29:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476869979] [2020-12-22 05:29:29,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:29:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:29:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:29,829 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-22 05:29:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:30,239 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-22 05:29:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:29:30,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:29:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:30,242 INFO L225 Difference]: With dead ends: 81 [2020-12-22 05:29:30,242 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 05:29:30,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:29:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 05:29:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-22 05:29:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 05:29:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-22 05:29:30,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-22 05:29:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:30,253 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-22 05:29:30,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:29:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-22 05:29:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:29:30,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:30,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:30,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:30,470 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-22 05:29:30,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:30,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399902562] [2020-12-22 05:29:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:30,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:30,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691332224] [2020-12-22 05:29:30,487 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 05:29:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:29:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:30,637 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 05:29:30,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399902562] [2020-12-22 05:29:30,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:30,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691332224] [2020-12-22 05:29:30,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:30,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:29:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231008956] [2020-12-22 05:29:30,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:29:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:29:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:30,640 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 5 states. [2020-12-22 05:29:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:30,677 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-12-22 05:29:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:30,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 05:29:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:30,680 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:29:30,680 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 05:29:30,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 05:29:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 05:29:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:29:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 05:29:30,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2020-12-22 05:29:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:30,688 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 05:29:30,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:29:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 05:29:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:29:30,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:30,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:30,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:30,904 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 77359410, now seen corresponding path program 1 times [2020-12-22 05:29:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:30,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847411473] [2020-12-22 05:29:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:30,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996866447] [2020-12-22 05:29:30,925 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 05:29:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:29:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:31,288 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 05:29:31,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847411473] [2020-12-22 05:29:31,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:31,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996866447] [2020-12-22 05:29:31,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:31,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:29:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021429482] [2020-12-22 05:29:31,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:29:31,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:29:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:29:31,297 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-12-22 05:29:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:31,688 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-22 05:29:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:29:31,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 05:29:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:31,689 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:29:31,690 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:29:31,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:29:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:29:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:29:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:29:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 05:29:31,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 17 [2020-12-22 05:29:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:31,696 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 05:29:31,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:29:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 05:29:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:29:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:31,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:31,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:31,911 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1461320627, now seen corresponding path program 1 times [2020-12-22 05:29:31,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:31,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079954463] [2020-12-22 05:29:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:31,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:31,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911797124] [2020-12-22 05:29:31,924 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 05:29:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:29:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:32,164 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 05:29:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079954463] [2020-12-22 05:29:32,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:32,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911797124] [2020-12-22 05:29:32,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:32,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:29:32,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894489069] [2020-12-22 05:29:32,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:29:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:29:32,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:29:32,167 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-12-22 05:29:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:32,574 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 05:29:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:29:32,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 05:29:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:32,575 INFO L225 Difference]: With dead ends: 40 [2020-12-22 05:29:32,575 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 05:29:32,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:29:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 05:29:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-12-22 05:29:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:29:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 05:29:32,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2020-12-22 05:29:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:32,582 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 05:29:32,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:29:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 05:29:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:29:32,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:32,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:32,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:32,798 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-22 05:29:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574812084] [2020-12-22 05:29:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:32,812 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:32,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240078605] [2020-12-22 05:29:32,812 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 05:29:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:29:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574812084] [2020-12-22 05:29:32,908 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240078605] [2020-12-22 05:29:32,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:32,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:29:32,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217307328] [2020-12-22 05:29:32,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:29:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:32,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:29:32,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:32,911 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 5 states. [2020-12-22 05:29:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:32,934 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 05:29:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:32,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-22 05:29:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:32,937 INFO L225 Difference]: With dead ends: 40 [2020-12-22 05:29:32,937 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 05:29:32,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 05:29:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 05:29:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:29:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-12-22 05:29:32,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 20 [2020-12-22 05:29:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:32,950 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-12-22 05:29:32,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:29:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-12-22 05:29:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:29:32,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:32,951 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:33,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:33,153 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:33,160 INFO L82 PathProgramCache]: Analyzing trace with hash 125341744, now seen corresponding path program 1 times [2020-12-22 05:29:33,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:33,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520068220] [2020-12-22 05:29:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:33,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:33,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671579968] [2020-12-22 05:29:33,186 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 05:29:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:29:33,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:29:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:29:33,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:29:33,314 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:29:33,314 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:29:33,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:33,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:29:33 BoogieIcfgContainer [2020-12-22 05:29:33,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:29:33,557 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:29:33,557 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:29:33,557 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:29:33,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:28" (3/4) ... [2020-12-22 05:29:33,559 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:29:33,609 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/hard-u_unwindbound1.c-witness.graphml [2020-12-22 05:29:33,610 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:29:33,612 INFO L168 Benchmark]: Toolchain (without parser) took 6212.94 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 128.0 MB in the beginning and 85.6 MB in the end (delta: 42.5 MB). Peak memory consumption was 81.9 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,612 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:29:33,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.95 ms. Allocated memory is still 152.0 MB. Free memory was 127.8 MB in the beginning and 117.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,614 INFO L168 Benchmark]: Boogie Preprocessor took 26.74 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,615 INFO L168 Benchmark]: RCFGBuilder took 635.35 ms. Allocated memory is still 152.0 MB. Free memory was 114.4 MB in the beginning and 97.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,615 INFO L168 Benchmark]: TraceAbstraction took 5188.42 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 97.2 MB in the beginning and 88.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 49.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,616 INFO L168 Benchmark]: Witness Printer took 52.94 ms. Allocated memory is still 190.8 MB. Free memory was 88.2 MB in the beginning and 85.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:29:33,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.95 ms. Allocated memory is still 152.0 MB. Free memory was 127.8 MB in the beginning and 117.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.74 ms. Allocated memory is still 152.0 MB. Free memory was 115.7 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 635.35 ms. Allocated memory is still 152.0 MB. Free memory was 114.4 MB in the beginning and 97.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5188.42 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 97.2 MB in the beginning and 88.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 49.4 MB. Max. memory is 8.0 GB. * Witness Printer took 52.94 ms. Allocated memory is still 190.8 MB. Free memory was 88.2 MB in the beginning and 85.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) VAL [counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<1 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND FALSE !(counter++<1) [L45] EXPR counter++ VAL [counter=3] [L45] COND FALSE !(counter++<1) [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND TRUE !(cond) VAL [counter=3] [L17] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 416 SDslu, 279 SDs, 0 SdLazy, 230 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=5, 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, 9 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 9441 SizeOfPredicates, 24 NumberOfNonLiveVariables, 427 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 6/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...