/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/divbin2_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:08:34,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:08:34,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:08:34,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:08:34,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:08:34,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:08:34,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:08:34,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:08:34,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:08:34,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:08:34,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:08:34,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:08:34,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:08:34,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:08:34,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:08:34,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:08:34,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:08:34,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:08:34,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:08:34,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:08:34,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:08:34,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:08:34,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:08:34,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:08:34,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:08:34,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:08:34,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:08:34,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:08:34,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:08:34,258 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:08:34,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:08:34,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:08:34,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:08:34,263 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:08:34,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:08:34,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:08:34,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:08:34,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:08:34,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:08:34,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:08:34,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:08:34,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:08:34,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:08:34,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:08:34,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:08:34,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:08:34,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:08:34,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:08:34,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:08:34,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:08:34,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:08:34,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:08:34,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:08:34,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:08:34,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:08:34,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:08:34,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:08:34,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:08:34,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:08:34,703 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:08:34,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2020-12-22 05:08:34,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce93dac42/23a712b78bdd4604844917f0fc8dac42/FLAG38eb574fd [2020-12-22 05:08:35,379 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:08:35,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2020-12-22 05:08:35,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce93dac42/23a712b78bdd4604844917f0fc8dac42/FLAG38eb574fd [2020-12-22 05:08:35,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce93dac42/23a712b78bdd4604844917f0fc8dac42 [2020-12-22 05:08:35,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:08:35,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:08:35,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:08:35,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:08:35,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:08:35,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:35,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd64e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35, skipping insertion in model container [2020-12-22 05:08:35,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:35,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:08:35,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:08:35,917 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/divbin2_unwindbound50.i[951,964] [2020-12-22 05:08:35,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:08:35,950 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:08:35,963 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/divbin2_unwindbound50.i[951,964] [2020-12-22 05:08:35,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:08:35,985 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:08:35,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35 WrapperNode [2020-12-22 05:08:35,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:08:35,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:08:35,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:08:35,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:08:35,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:08:36,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:08:36,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:08:36,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:08:36,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (1/1) ... [2020-12-22 05:08:36,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:08:36,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:08:36,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:08:36,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:08:36,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (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 05:08:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:08:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:08:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:08:36,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:08:36,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:08:36,572 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 05:08:36,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:08:36 BoogieIcfgContainer [2020-12-22 05:08:36,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:08:36,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:08:36,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:08:36,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:08:36,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:08:35" (1/3) ... [2020-12-22 05:08:36,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9d7c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:08:36, skipping insertion in model container [2020-12-22 05:08:36,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:08:35" (2/3) ... [2020-12-22 05:08:36,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9d7c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:08:36, skipping insertion in model container [2020-12-22 05:08:36,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:08:36" (3/3) ... [2020-12-22 05:08:36,584 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2020-12-22 05:08:36,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:08:36,598 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:08:36,668 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:08:36,734 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:08:36,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:08:36,734 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:08:36,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:08:36,735 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:08:36,735 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:08:36,735 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:08:36,735 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:08:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 05:08:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:08:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:36,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:36,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2020-12-22 05:08:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:36,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406592779] [2020-12-22 05:08:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:36,986 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 05:08:36,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406592779] [2020-12-22 05:08:36,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:08:36,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:08:36,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371295710] [2020-12-22 05:08:36,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:08:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:08:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:08:37,021 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-22 05:08:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:37,046 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2020-12-22 05:08:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:08:37,047 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:08:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:37,074 INFO L225 Difference]: With dead ends: 35 [2020-12-22 05:08:37,074 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:08:37,080 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 05:08:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:08:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:08:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:08:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-22 05:08:37,116 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2020-12-22 05:08:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:37,117 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-22 05:08:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:08:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-22 05:08:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:08:37,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:37,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:37,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:08:37,118 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:37,119 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2020-12-22 05:08:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:37,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991153283] [2020-12-22 05:08:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:37,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:37,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017052558] [2020-12-22 05:08:37,137 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 05:08:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:08:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:37,286 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 05:08:37,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991153283] [2020-12-22 05:08:37,287 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:37,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017052558] [2020-12-22 05:08:37,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:08:37,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:08:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314645936] [2020-12-22 05:08:37,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:08:37,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:08:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:08:37,291 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2020-12-22 05:08:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:37,311 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-22 05:08:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:08:37,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 05:08:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:37,313 INFO L225 Difference]: With dead ends: 29 [2020-12-22 05:08:37,313 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:08:37,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 05:08:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:08:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:08:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:08:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 05:08:37,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2020-12-22 05:08:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:37,320 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 05:08:37,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:08:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 05:08:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:08:37,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:37,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:37,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:08:37,537 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2020-12-22 05:08:37,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:37,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734384451] [2020-12-22 05:08:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:37,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:37,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910633585] [2020-12-22 05:08:37,575 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 05:08:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:37,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:08:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:37,706 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 05:08:37,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734384451] [2020-12-22 05:08:37,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:37,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910633585] [2020-12-22 05:08:37,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:08:37,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:08:37,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559914456] [2020-12-22 05:08:37,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:08:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:37,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:08:37,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:08:37,710 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-22 05:08:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:37,805 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-22 05:08:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:08:37,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 05:08:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:37,807 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:08:37,807 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:08:37,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 05:08:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:08:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-12-22 05:08:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:08:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-22 05:08:37,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2020-12-22 05:08:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:37,814 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-22 05:08:37,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:08:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-22 05:08:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:08:37,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:37,816 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:38,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:38,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2020-12-22 05:08:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:38,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290432898] [2020-12-22 05:08:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:38,050 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:38,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405524450] [2020-12-22 05:08:38,050 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 05:08:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:08:38,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:38,154 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 05:08:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290432898] [2020-12-22 05:08:38,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:38,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405524450] [2020-12-22 05:08:38,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:38,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:08:38,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067358895] [2020-12-22 05:08:38,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:08:38,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:08:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:08:38,158 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-22 05:08:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:38,188 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-12-22 05:08:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:08:38,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 05:08:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:38,190 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:08:38,190 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 05:08:38,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:08:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 05:08:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 05:08:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 05:08:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-22 05:08:38,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2020-12-22 05:08:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:38,198 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-22 05:08:38,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:08:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-22 05:08:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:08:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:38,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:38,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:38,409 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2020-12-22 05:08:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:38,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504272569] [2020-12-22 05:08:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:38,436 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:38,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210359672] [2020-12-22 05:08:38,440 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 05:08:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:08:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:38,579 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 05:08:38,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504272569] [2020-12-22 05:08:38,580 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:38,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210359672] [2020-12-22 05:08:38,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:38,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:08:38,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760460732] [2020-12-22 05:08:38,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:08:38,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:08:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:08:38,583 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-22 05:08:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:38,710 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-12-22 05:08:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:08:38,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 05:08:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:38,712 INFO L225 Difference]: With dead ends: 43 [2020-12-22 05:08:38,712 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 05:08:38,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:08:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 05:08:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-22 05:08:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:08:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-22 05:08:38,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2020-12-22 05:08:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:38,720 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-22 05:08:38,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:08:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-22 05:08:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:08:38,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:38,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:38,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:38,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2020-12-22 05:08:38,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:38,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599922825] [2020-12-22 05:08:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:38,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:38,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988601365] [2020-12-22 05:08:38,961 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 05:08:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:08:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:39,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599922825] [2020-12-22 05:08:39,049 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:39,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988601365] [2020-12-22 05:08:39,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:08:39,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:08:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235978301] [2020-12-22 05:08:39,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:08:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:39,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:08:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:08:39,052 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-22 05:08:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:39,076 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-12-22 05:08:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:08:39,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 05:08:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:39,077 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:08:39,077 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 05:08:39,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:08:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 05:08:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 05:08:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 05:08:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-22 05:08:39,084 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2020-12-22 05:08:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:39,084 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-22 05:08:39,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:08:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-22 05:08:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:08:39,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:39,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:39,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:08:39,301 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2020-12-22 05:08:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:39,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308947991] [2020-12-22 05:08:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:39,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:39,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460556270] [2020-12-22 05:08:39,322 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 05:08:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 05:08:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:39,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308947991] [2020-12-22 05:08:39,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:39,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460556270] [2020-12-22 05:08:39,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:39,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:08:39,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766255097] [2020-12-22 05:08:39,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:08:39,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:39,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:08:39,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:08:39,568 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2020-12-22 05:08:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:39,781 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-12-22 05:08:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:08:39,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-22 05:08:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:39,783 INFO L225 Difference]: With dead ends: 58 [2020-12-22 05:08:39,783 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 05:08:39,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:08:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 05:08:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-12-22 05:08:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:08:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-22 05:08:39,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2020-12-22 05:08:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:39,789 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-22 05:08:39,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:08:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-22 05:08:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:08:39,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:39,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:40,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:40,005 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2020-12-22 05:08:40,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:40,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462298888] [2020-12-22 05:08:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:40,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:40,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845269921] [2020-12-22 05:08:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:08:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 05:08:40,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462298888] [2020-12-22 05:08:40,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:40,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845269921] [2020-12-22 05:08:40,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:08:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327795528] [2020-12-22 05:08:40,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:08:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:08:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:08:40,137 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-12-22 05:08:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:40,184 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-12-22 05:08:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:08:40,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 05:08:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:40,186 INFO L225 Difference]: With dead ends: 54 [2020-12-22 05:08:40,186 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 05:08:40,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:08:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 05:08:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 05:08:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:08:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-22 05:08:40,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2020-12-22 05:08:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:40,193 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-22 05:08:40,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:08:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-22 05:08:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:08:40,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:40,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:40,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:40,408 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2020-12-22 05:08:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:40,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83187937] [2020-12-22 05:08:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:40,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704866236] [2020-12-22 05:08:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:40,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:08:40,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 05:08:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:40,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83187937] [2020-12-22 05:08:40,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704866236] [2020-12-22 05:08:40,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:40,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:08:40,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340828962] [2020-12-22 05:08:40,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:08:40,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:40,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:08:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:08:40,835 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2020-12-22 05:08:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:41,075 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-12-22 05:08:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:08:41,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 05:08:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:41,076 INFO L225 Difference]: With dead ends: 70 [2020-12-22 05:08:41,076 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 05:08:41,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:08:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 05:08:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2020-12-22 05:08:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 05:08:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-22 05:08:41,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2020-12-22 05:08:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:41,083 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-22 05:08:41,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:08:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-22 05:08:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 05:08:41,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:41,085 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:41,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:08:41,300 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2020-12-22 05:08:41,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:41,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668410844] [2020-12-22 05:08:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:41,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:41,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870348611] [2020-12-22 05:08:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:41,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:08:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:08:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 05:08:41,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668410844] [2020-12-22 05:08:41,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:41,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870348611] [2020-12-22 05:08:41,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:41,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:08:41,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024096800] [2020-12-22 05:08:41,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:08:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:08:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:08:41,438 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2020-12-22 05:08:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:41,490 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-12-22 05:08:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:08:41,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 05:08:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:41,494 INFO L225 Difference]: With dead ends: 63 [2020-12-22 05:08:41,494 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 05:08:41,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:08:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 05:08:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-22 05:08:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 05:08:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-22 05:08:41,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2020-12-22 05:08:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:41,515 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-22 05:08:41,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:08:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-22 05:08:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 05:08:41,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:41,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:41,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:41,734 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2020-12-22 05:08:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:41,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431378725] [2020-12-22 05:08:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:41,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:41,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833848459] [2020-12-22 05:08:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 05:08:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431378725] [2020-12-22 05:08:41,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833848459] [2020-12-22 05:08:41,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:41,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:08:41,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151905834] [2020-12-22 05:08:41,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:08:41,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:41,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:08:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:08:41,985 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-12-22 05:08:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:42,044 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-22 05:08:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:08:42,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-22 05:08:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:42,045 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:08:42,045 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:08:42,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:08:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:08:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 05:08:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 05:08:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-22 05:08:42,051 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2020-12-22 05:08:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:42,051 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-22 05:08:42,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:08:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-22 05:08:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:08:42,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:42,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:42,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:42,268 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2020-12-22 05:08:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:42,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208511356] [2020-12-22 05:08:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:42,284 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:42,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312277667] [2020-12-22 05:08:42,284 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:42,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:08:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:08:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:42,772 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-12-22 05:08:43,029 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:43,406 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:44,456 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:45,604 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:47,193 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:49,008 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:08:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 05:08:49,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208511356] [2020-12-22 05:08:49,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:49,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312277667] [2020-12-22 05:08:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:49,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:08:49,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419963960] [2020-12-22 05:08:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:08:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:08:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:08:49,695 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-12-22 05:08:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:50,280 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-22 05:08:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:08:50,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-22 05:08:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:50,282 INFO L225 Difference]: With dead ends: 66 [2020-12-22 05:08:50,282 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:08:50,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:08:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:08:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-22 05:08:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 05:08:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-22 05:08:50,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2020-12-22 05:08:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:50,289 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-22 05:08:50,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:08:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-22 05:08:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:08:50,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:50,290 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:50,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:08:50,503 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2020-12-22 05:08:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:50,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967583495] [2020-12-22 05:08:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:50,516 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:50,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896877557] [2020-12-22 05:08:50,517 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:50,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:08:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 05:08:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 05:08:50,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967583495] [2020-12-22 05:08:50,606 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:50,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896877557] [2020-12-22 05:08:50,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:50,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:08:50,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401384759] [2020-12-22 05:08:50,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:08:50,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:50,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:08:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:08:50,608 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-12-22 05:08:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:50,646 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-22 05:08:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:08:50,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-22 05:08:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:50,647 INFO L225 Difference]: With dead ends: 74 [2020-12-22 05:08:50,647 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 05:08:50,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:08:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 05:08:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-12-22 05:08:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 05:08:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-22 05:08:50,653 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2020-12-22 05:08:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:50,653 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-22 05:08:50,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:08:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-22 05:08:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:08:50,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:50,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:50,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:08:50,868 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2020-12-22 05:08:50,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:50,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428852057] [2020-12-22 05:08:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:50,879 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:50,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82763323] [2020-12-22 05:08:50,879 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:51,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:08:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 05:08:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:51,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:08:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:51,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428852057] [2020-12-22 05:08:51,307 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:51,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82763323] [2020-12-22 05:08:51,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-22 05:08:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745652061] [2020-12-22 05:08:51,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 05:08:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 05:08:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:08:51,309 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2020-12-22 05:08:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:51,603 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-12-22 05:08:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:08:51,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-22 05:08:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:51,605 INFO L225 Difference]: With dead ends: 67 [2020-12-22 05:08:51,605 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 05:08:51,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:08:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 05:08:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-12-22 05:08:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 05:08:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-22 05:08:51,611 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2020-12-22 05:08:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:51,611 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-22 05:08:51,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 05:08:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-22 05:08:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:08:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:51,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 05:08:51,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 05:08:51,824 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1793535410, now seen corresponding path program 4 times [2020-12-22 05:08:51,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:51,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210558271] [2020-12-22 05:08:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:51,835 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:51,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317829984] [2020-12-22 05:08:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:52,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:08:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:08:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 05:08:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:08:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210558271] [2020-12-22 05:08:52,428 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:52,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317829984] [2020-12-22 05:08:52,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:52,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-22 05:08:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98680016] [2020-12-22 05:08:52,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 05:08:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 05:08:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:08:52,430 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2020-12-22 05:08:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:52,815 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-12-22 05:08:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:08:52,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-22 05:08:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:52,817 INFO L225 Difference]: With dead ends: 71 [2020-12-22 05:08:52,817 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 05:08:52,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:08:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 05:08:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-12-22 05:08:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 05:08:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-22 05:08:52,822 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2020-12-22 05:08:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:52,823 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-22 05:08:52,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 05:08:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-22 05:08:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 05:08:52,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:52,824 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:53,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:53,032 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1780420744, now seen corresponding path program 1 times [2020-12-22 05:08:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:53,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963055426] [2020-12-22 05:08:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:53,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:53,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165238311] [2020-12-22 05:08:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:08:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:08:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:08:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:08:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 05:08:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963055426] [2020-12-22 05:08:53,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:08:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165238311] [2020-12-22 05:08:53,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:08:53,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:08:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518282951] [2020-12-22 05:08:53,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:08:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:08:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:08:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:08:53,186 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-12-22 05:08:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:08:53,254 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-22 05:08:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:08:53,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 05:08:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:08:53,255 INFO L225 Difference]: With dead ends: 68 [2020-12-22 05:08:53,255 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 05:08:53,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:08:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 05:08:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 05:08:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 05:08:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-22 05:08:53,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2020-12-22 05:08:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:08:53,262 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-22 05:08:53,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:08:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-22 05:08:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:08:53,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:08:53,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:08:53,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 05:08:53,477 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:08:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:08:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash 848950570, now seen corresponding path program 3 times [2020-12-22 05:08:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:08:53,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511520062] [2020-12-22 05:08:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:08:53,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:08:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765340908] [2020-12-22 05:08:53,501 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 05:09:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:09:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 05:09:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:05,620 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511520062] [2020-12-22 05:09:05,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765340908] [2020-12-22 05:09:05,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 05:09:05,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:05,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:09:05,624 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:09:05,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:09:05,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 05:09:05,855 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:09:05,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:09:05 BoogieIcfgContainer [2020-12-22 05:09:05,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:09:05,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:09:05,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:09:05,856 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:09:05,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:08:36" (3/4) ... [2020-12-22 05:09:05,861 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:09:05,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:09:05,862 INFO L168 Benchmark]: Toolchain (without parser) took 30151.69 ms. Allocated memory was 162.5 MB in the beginning and 342.9 MB in the end (delta: 180.4 MB). Free memory was 138.2 MB in the beginning and 311.1 MB in the end (delta: -172.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:05,863 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 136.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:09:05,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.91 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 128.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:05,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 162.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:05,864 INFO L168 Benchmark]: Boogie Preprocessor took 26.80 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 125.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:05,865 INFO L168 Benchmark]: RCFGBuilder took 522.13 ms. Allocated memory is still 162.5 MB. Free memory was 125.6 MB in the beginning and 112.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:05,865 INFO L168 Benchmark]: TraceAbstraction took 29279.62 ms. Allocated memory was 162.5 MB in the beginning and 342.9 MB in the end (delta: 180.4 MB). Free memory was 111.8 MB in the beginning and 311.6 MB in the end (delta: -199.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:09:05,866 INFO L168 Benchmark]: Witness Printer took 4.87 ms. Allocated memory is still 342.9 MB. Free memory was 311.6 MB in the beginning and 311.1 MB in the end (delta: 505.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:09:05,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 136.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.91 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 128.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 162.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.80 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 125.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 522.13 ms. Allocated memory is still 162.5 MB. Free memory was 125.6 MB in the beginning and 112.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29279.62 ms. Allocated memory was 162.5 MB in the beginning and 342.9 MB in the end (delta: 180.4 MB). Free memory was 111.8 MB in the beginning and 311.6 MB in the end (delta: -199.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 4.87 ms. Allocated memory is still 342.9 MB. Free memory was 311.6 MB in the beginning and 311.1 MB in the end (delta: 505.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND TRUE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 29.1s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 180 SDslu, 909 SDs, 0 SdLazy, 868 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 72 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 285 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 269 ConstructedInterpolants, 0 QuantifiedInterpolants, 53254 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 64/186 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...