/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/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:24:09,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:24:09,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:24:09,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:24:09,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:24:09,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:24:09,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:24:09,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:24:09,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:24:09,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:24:09,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:24:09,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:24:09,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:24:09,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:24:09,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:24:09,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:24:09,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:24:09,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:24:09,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:24:09,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:24:09,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:24:09,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:24:09,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:24:09,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:24:09,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:24:09,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:24:09,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:24:09,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:24:09,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:24:09,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:24:09,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:24:09,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:24:09,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:24:09,372 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:24:09,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:24:09,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:24:09,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:24:09,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:24:09,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:24:09,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:24:09,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:24:09,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:24:09,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:24:09,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:24:09,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:24:09,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:24:09,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:24:09,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:24:09,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:24:09,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:24:09,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:24:09,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:24:09,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:24:09,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:24:09,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:24:09,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:24:09,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:24:09,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:24:09,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:24:09,902 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:24:09,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2020-12-21 21:24:10,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec9cc218f/e8d9954887ce4e65b4f878c02f26d84c/FLAG0cdab548b [2020-12-21 21:24:10,843 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:24:10,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2020-12-21 21:24:10,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec9cc218f/e8d9954887ce4e65b4f878c02f26d84c/FLAG0cdab548b [2020-12-21 21:24:11,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec9cc218f/e8d9954887ce4e65b4f878c02f26d84c [2020-12-21 21:24:11,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:24:11,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:24:11,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:11,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:24:11,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:24:11,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179703b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11, skipping insertion in model container [2020-12-21 21:24:11,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:24:11,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:24:11,486 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/array-examples/standard_copy2_ground-1.i[816,829] [2020-12-21 21:24:11,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:11,522 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:24:11,538 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/array-examples/standard_copy2_ground-1.i[816,829] [2020-12-21 21:24:11,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:11,572 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:24:11,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11 WrapperNode [2020-12-21 21:24:11,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:11,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:11,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:24:11,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:24:11,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:11,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:24:11,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:24:11,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:24:11,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (1/1) ... [2020-12-21 21:24:11,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:24:11,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:24:11,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:24:11,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:24:11,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (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 [2020-12-21 21:24:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:24:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:24:11,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:24:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:24:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:24:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:24:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:24:12,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:24:12,289 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:24:12,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:12 BoogieIcfgContainer [2020-12-21 21:24:12,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:24:12,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:24:12,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:24:12,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:24:12,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:24:11" (1/3) ... [2020-12-21 21:24:12,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eac25ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:12, skipping insertion in model container [2020-12-21 21:24:12,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:11" (2/3) ... [2020-12-21 21:24:12,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eac25ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:12, skipping insertion in model container [2020-12-21 21:24:12,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:12" (3/3) ... [2020-12-21 21:24:12,305 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2020-12-21 21:24:12,314 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:24:12,322 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:24:12,364 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:24:12,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:24:12,411 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:24:12,411 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:24:12,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:24:12,412 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:24:12,412 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:24:12,412 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:24:12,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:24:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 21:24:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:24:12,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:12,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:12,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2020-12-21 21:24:12,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:12,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685506243] [2020-12-21 21:24:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:24:12,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685506243] [2020-12-21 21:24:12,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:24:12,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:24:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246952479] [2020-12-21 21:24:12,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:12,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:12,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:24:12,881 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-21 21:24:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:12,939 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2020-12-21 21:24:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:12,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:24:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:12,952 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:24:12,953 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 21:24:12,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:24:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 21:24:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-21 21:24:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 21:24:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 21:24:13,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-12-21 21:24:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:13,002 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 21:24:13,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 21:24:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:24:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:13,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:24:13,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2020-12-21 21:24:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:13,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123674602] [2020-12-21 21:24:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:24:13,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123674602] [2020-12-21 21:24:13,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598469627] [2020-12-21 21:24:13,148 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 [2020-12-21 21:24:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:24:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:24:13,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:24:13,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:24:13,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320252779] [2020-12-21 21:24:13,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:13,289 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-21 21:24:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:13,323 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-21 21:24:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:13,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-21 21:24:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:13,325 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:24:13,326 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:24:13,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:24:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-21 21:24:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:24:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-21 21:24:13,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-12-21 21:24:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:13,334 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-21 21:24:13,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-21 21:24:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:24:13,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:13,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:24:13,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2020-12-21 21:24:13,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:13,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317312415] [2020-12-21 21:24:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:24:13,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317312415] [2020-12-21 21:24:13,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305451753] [2020-12-21 21:24:13,613 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 [2020-12-21 21:24:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:24:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:24:13,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:13,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:24:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719784594] [2020-12-21 21:24:13,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:24:13,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:13,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:24:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:13,794 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-21 21:24:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:13,844 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-12-21 21:24:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:24:13,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-21 21:24:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:13,847 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:24:13,847 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:24:13,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:24:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 21:24:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:24:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-21 21:24:13,865 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-12-21 21:24:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:13,865 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-21 21:24:13,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:24:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-21 21:24:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:24:13,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:14,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:14,085 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash 34773395, now seen corresponding path program 2 times [2020-12-21 21:24:14,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:14,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731266693] [2020-12-21 21:24:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:24:14,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731266693] [2020-12-21 21:24:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711837150] [2020-12-21 21:24:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:14,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:14,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:24:14,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:14,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:24:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441734068] [2020-12-21 21:24:14,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:24:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:14,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:24:14,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:14,289 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-12-21 21:24:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:14,398 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-21 21:24:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:14,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-21 21:24:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:14,402 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:24:14,402 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 21:24:14,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 21:24:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-21 21:24:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:24:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-21 21:24:14,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-12-21 21:24:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:14,425 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-21 21:24:14,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:24:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-21 21:24:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:24:14,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:14,427 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:14,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:14,642 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1324303987, now seen corresponding path program 3 times [2020-12-21 21:24:14,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:14,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580853903] [2020-12-21 21:24:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:24:14,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580853903] [2020-12-21 21:24:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554264985] [2020-12-21 21:24:14,830 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 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 [2020-12-21 21:24:14,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:24:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:24:14,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:24:14,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421947393] [2020-12-21 21:24:14,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:24:14,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:24:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:24:14,982 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-12-21 21:24:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:15,077 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-21 21:24:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:24:15,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-21 21:24:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:15,079 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:24:15,079 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:24:15,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:24:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:24:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-21 21:24:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:24:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-21 21:24:15,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-12-21 21:24:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:15,098 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-21 21:24:15,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:24:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-21 21:24:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:24:15,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:15,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:15,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:15,313 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash -288016889, now seen corresponding path program 4 times [2020-12-21 21:24:15,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:15,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456606298] [2020-12-21 21:24:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:24:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456606298] [2020-12-21 21:24:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269297567] [2020-12-21 21:24:15,427 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 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 [2020-12-21 21:24:15,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:15,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:24:15,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:15,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:24:15,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388995851] [2020-12-21 21:24:15,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:24:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:24:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:24:15,546 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-12-21 21:24:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:15,584 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-12-21 21:24:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:15,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-21 21:24:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:15,586 INFO L225 Difference]: With dead ends: 60 [2020-12-21 21:24:15,586 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:24:15,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:24:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:24:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 21:24:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:24:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-21 21:24:15,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2020-12-21 21:24:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:15,594 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-21 21:24:15,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:24:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-21 21:24:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:24:15,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:15,596 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:15,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:24:15,810 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1946435387, now seen corresponding path program 5 times [2020-12-21 21:24:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:15,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664895437] [2020-12-21 21:24:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:24:16,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664895437] [2020-12-21 21:24:16,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066027608] [2020-12-21 21:24:16,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 21:24:16,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:24:16,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:24:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 21:24:17,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:17,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:24:17,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692467801] [2020-12-21 21:24:17,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:17,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:17,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:17,028 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 12 states. [2020-12-21 21:24:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:17,155 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-21 21:24:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:24:17,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-21 21:24:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:17,157 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:24:17,157 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:24:17,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:24:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-21 21:24:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:24:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-21 21:24:17,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-12-21 21:24:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:17,165 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-21 21:24:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-21 21:24:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:24:17,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:17,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:17,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:17,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash -287853761, now seen corresponding path program 6 times [2020-12-21 21:24:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:17,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806383305] [2020-12-21 21:24:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:24:17,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806383305] [2020-12-21 21:24:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368965430] [2020-12-21 21:24:17,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 21:24:17,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:24:17,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:24:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:17,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:24:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101261104] [2020-12-21 21:24:17,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:24:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:24:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:17,886 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 14 states. [2020-12-21 21:24:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:18,038 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-12-21 21:24:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:24:18,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-12-21 21:24:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:18,040 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:24:18,040 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:24:18,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:24:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-21 21:24:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:24:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-21 21:24:18,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-12-21 21:24:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:18,048 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-21 21:24:18,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:24:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-21 21:24:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:24:18,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:18,049 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:18,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:18,263 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2091000377, now seen corresponding path program 7 times [2020-12-21 21:24:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:18,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158379196] [2020-12-21 21:24:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:24:18,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158379196] [2020-12-21 21:24:18,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033878298] [2020-12-21 21:24:18,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-21 21:24:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:24:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:24:18,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:18,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:24:18,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291829940] [2020-12-21 21:24:18,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:24:18,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:24:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:24:18,575 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 11 states. [2020-12-21 21:24:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:18,623 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-12-21 21:24:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:24:18,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-21 21:24:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:18,624 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:24:18,624 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:24:18,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:24:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:24:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-21 21:24:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:24:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-21 21:24:18,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-12-21 21:24:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:18,632 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-21 21:24:18,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:24:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-21 21:24:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:24:18,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:18,633 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:18,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:24:18,847 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 392693879, now seen corresponding path program 8 times [2020-12-21 21:24:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:18,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601814264] [2020-12-21 21:24:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:24:18,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601814264] [2020-12-21 21:24:18,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676527251] [2020-12-21 21:24:18,976 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 [2020-12-21 21:24:19,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:24:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:24:19,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:19,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:24:19,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016374016] [2020-12-21 21:24:19,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:19,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:19,134 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 12 states. [2020-12-21 21:24:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:19,194 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-12-21 21:24:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:24:19,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-12-21 21:24:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:19,199 INFO L225 Difference]: With dead ends: 84 [2020-12-21 21:24:19,200 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:24:19,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:24:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 21:24:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:24:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-21 21:24:19,215 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 47 [2020-12-21 21:24:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:19,215 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-21 21:24:19,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-21 21:24:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:24:19,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:19,217 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:19,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:19,431 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash 407721781, now seen corresponding path program 9 times [2020-12-21 21:24:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:19,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423101027] [2020-12-21 21:24:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:24:19,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423101027] [2020-12-21 21:24:19,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272794652] [2020-12-21 21:24:19,566 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 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 [2020-12-21 21:24:19,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:24:19,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:24:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-21 21:24:19,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:19,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:24:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854312250] [2020-12-21 21:24:19,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:24:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:24:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:24:19,989 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-12-21 21:24:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:20,134 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-12-21 21:24:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:24:20,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-12-21 21:24:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:20,135 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:24:20,135 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:24:20,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:24:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:24:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-21 21:24:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:24:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-12-21 21:24:20,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-12-21 21:24:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:20,143 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-12-21 21:24:20,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:24:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-12-21 21:24:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:24:20,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:20,144 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:20,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:20,359 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash -589679185, now seen corresponding path program 10 times [2020-12-21 21:24:20,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:20,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992985898] [2020-12-21 21:24:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:24:20,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992985898] [2020-12-21 21:24:20,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970548598] [2020-12-21 21:24:20,521 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 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 [2020-12-21 21:24:20,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:20,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:24:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:24:20,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:20,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:24:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526257650] [2020-12-21 21:24:20,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:24:20,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:24:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:20,722 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 14 states. [2020-12-21 21:24:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:20,778 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-12-21 21:24:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:24:20,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-12-21 21:24:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:20,782 INFO L225 Difference]: With dead ends: 96 [2020-12-21 21:24:20,783 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:24:20,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:24:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 21:24:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 21:24:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-12-21 21:24:20,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 55 [2020-12-21 21:24:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:20,798 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-12-21 21:24:20,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:24:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-12-21 21:24:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:24:20,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:20,800 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:21,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:24:21,014 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash 224126573, now seen corresponding path program 11 times [2020-12-21 21:24:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:21,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314788576] [2020-12-21 21:24:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:24:21,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314788576] [2020-12-21 21:24:21,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081836741] [2020-12-21 21:24:21,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 21:25:20,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:25:20,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:25:20,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:25:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-21 21:25:20,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:20,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-12-21 21:25:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583893823] [2020-12-21 21:25:20,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:25:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:25:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:25:20,260 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 21 states. [2020-12-21 21:25:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:20,407 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-12-21 21:25:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:25:20,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-12-21 21:25:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:20,408 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:25:20,408 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:25:20,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:25:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:25:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-21 21:25:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:25:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-12-21 21:25:20,415 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 57 [2020-12-21 21:25:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:20,415 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-12-21 21:25:20,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:25:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-12-21 21:25:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:25:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:20,416 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:20,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:25:20,617 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1552038631, now seen corresponding path program 12 times [2020-12-21 21:25:20,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:20,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980176223] [2020-12-21 21:25:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:25:20,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980176223] [2020-12-21 21:25:20,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031150136] [2020-12-21 21:25:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 21:25:25,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:25:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:25:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:25:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-12-21 21:25:25,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:25,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-12-21 21:25:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193806499] [2020-12-21 21:25:25,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:25:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:25:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:25:25,885 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 23 states. [2020-12-21 21:25:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:26,052 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-12-21 21:25:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:25:26,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-21 21:25:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:26,054 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:25:26,054 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:25:26,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:25:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:25:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-21 21:25:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:25:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-12-21 21:25:26,060 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2020-12-21 21:25:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:26,060 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-12-21 21:25:26,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:25:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-12-21 21:25:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:25:26,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:26,061 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:26,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:25:26,262 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -670200863, now seen corresponding path program 13 times [2020-12-21 21:25:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:26,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855851748] [2020-12-21 21:25:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:25:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855851748] [2020-12-21 21:25:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498812305] [2020-12-21 21:25:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-21 21:25:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:25:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:25:26,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:26,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:25:26,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127223748] [2020-12-21 21:25:26,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:25:26,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:26,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:25:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:25:26,748 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 17 states. [2020-12-21 21:25:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:26,815 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-12-21 21:25:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:25:26,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-12-21 21:25:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:26,817 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:25:26,817 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:25:26,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:25:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:25:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-21 21:25:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:25:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-12-21 21:25:26,823 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-12-21 21:25:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:26,823 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-12-21 21:25:26,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:25:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-12-21 21:25:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:25:26,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:26,824 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:27,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:25:27,039 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash 481564703, now seen corresponding path program 14 times [2020-12-21 21:25:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:27,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140901240] [2020-12-21 21:25:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:25:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140901240] [2020-12-21 21:25:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043951287] [2020-12-21 21:25:27,243 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 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 [2020-12-21 21:25:27,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:25:27,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:25:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:25:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:25:27,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:27,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:25:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440991560] [2020-12-21 21:25:27,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:25:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:27,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:25:27,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:25:27,435 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 18 states. [2020-12-21 21:25:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:27,520 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-12-21 21:25:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:25:27,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-12-21 21:25:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:27,522 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:25:27,522 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:25:27,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:25:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:25:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-21 21:25:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:25:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-12-21 21:25:27,529 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 71 [2020-12-21 21:25:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:27,529 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-12-21 21:25:27,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:25:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-12-21 21:25:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:25:27,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:27,530 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:27,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:25:27,745 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -773288739, now seen corresponding path program 15 times [2020-12-21 21:25:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:27,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988355163] [2020-12-21 21:25:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:25:27,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988355163] [2020-12-21 21:25:27,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052059864] [2020-12-21 21:25:27,965 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 [2020-12-21 21:25:29,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:25:29,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:25:29,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:25:29,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:25:29,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:29,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-12-21 21:25:29,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671908227] [2020-12-21 21:25:29,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:25:29,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:29,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:25:29,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:25:29,768 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 27 states. [2020-12-21 21:25:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:30,018 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-21 21:25:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:25:30,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-12-21 21:25:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:30,019 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:25:30,020 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:25:30,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:25:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:25:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-21 21:25:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:25:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-12-21 21:25:30,025 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 73 [2020-12-21 21:25:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:30,026 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-12-21 21:25:30,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:25:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-12-21 21:25:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:25:30,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:30,027 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:30,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:25:30,241 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash -859583145, now seen corresponding path program 16 times [2020-12-21 21:25:30,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:30,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117466861] [2020-12-21 21:25:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:25:30,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117466861] [2020-12-21 21:25:30,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847195130] [2020-12-21 21:25:30,510 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:25:30,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:25:30,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:25:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:25:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:25:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-12-21 21:25:30,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:25:30,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2020-12-21 21:25:30,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094023552] [2020-12-21 21:25:30,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:25:30,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:25:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:25:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:25:30,869 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 29 states. [2020-12-21 21:25:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:25:31,114 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-12-21 21:25:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:25:31,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-21 21:25:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:25:31,115 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:25:31,115 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:25:31,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:25:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:25:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-21 21:25:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:25:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-12-21 21:25:31,121 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2020-12-21 21:25:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:25:31,121 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-12-21 21:25:31,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:25:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-12-21 21:25:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:25:31,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:25:31,122 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:25:31,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:25:31,337 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:25:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:25:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1574111825, now seen corresponding path program 17 times [2020-12-21 21:25:31,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:25:31,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326964175] [2020-12-21 21:25:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:25:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:25:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 21:25:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326964175] [2020-12-21 21:25:31,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283656208] [2020-12-21 21:25:31,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true