/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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:24:39,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:24:39,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:24:40,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:24:40,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:24:40,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:24:40,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:24:40,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:24:40,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:24:40,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:24:40,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:24:40,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:24:40,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:24:40,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:24:40,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:24:40,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:24:40,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:24:40,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:24:40,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:24:40,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:24:40,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:24:40,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:24:40,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:24:40,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:24:40,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:24:40,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:24:40,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:24:40,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:24:40,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:24:40,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:24:40,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:24:40,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:24:40,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:24:40,183 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:24:40,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:24:40,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:24:40,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:24:40,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:24:40,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:24:40,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:24:40,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:24:40,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:24:40,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:24:40,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:24:40,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:24:40,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:24:40,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:24:40,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:24:40,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:24:40,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:24:40,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:24:40,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:24:40,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:24:40,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:24:40,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:24:40,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:24:40,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:24:40,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:24:40,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:24:40,640 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:24:40,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2020-12-21 21:24:40,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09be5bee8/eaf523c15a6a4cf8880c4b5c762bdc35/FLAG3bceca5f4 [2020-12-21 21:24:41,319 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:24:41,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2020-12-21 21:24:41,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09be5bee8/eaf523c15a6a4cf8880c4b5c762bdc35/FLAG3bceca5f4 [2020-12-21 21:24:41,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09be5bee8/eaf523c15a6a4cf8880c4b5c762bdc35 [2020-12-21 21:24:41,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:24:41,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:24:41,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:41,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:24:41,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:24:41,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:41" (1/1) ... [2020-12-21 21:24:41,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e1ea72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:41, skipping insertion in model container [2020-12-21 21:24:41,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:41" (1/1) ... [2020-12-21 21:24:41,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:24:41,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:24:41,996 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_copy6_ground-2.i[816,829] [2020-12-21 21:24:42,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:42,057 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:24:42,074 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_copy6_ground-2.i[816,829] [2020-12-21 21:24:42,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:42,145 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:24:42,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42 WrapperNode [2020-12-21 21:24:42,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:42,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:42,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:24:42,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:24:42,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:42,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:24:42,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:24:42,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:24:42,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (1/1) ... [2020-12-21 21:24:42,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:24:42,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:24:42,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:24:42,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:24:42,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (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 21:24:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:24:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:24:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:24:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:24:42,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:24:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:24:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:24:42,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:24:42,812 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-21 21:24:42,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:42 BoogieIcfgContainer [2020-12-21 21:24:42,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:24:42,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:24:42,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:24:42,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:24:42,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:24:41" (1/3) ... [2020-12-21 21:24:42,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e684361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:42, skipping insertion in model container [2020-12-21 21:24:42,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:42" (2/3) ... [2020-12-21 21:24:42,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e684361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:42, skipping insertion in model container [2020-12-21 21:24:42,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:42" (3/3) ... [2020-12-21 21:24:42,827 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2020-12-21 21:24:42,835 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:24:42,842 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:24:42,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:24:42,894 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:24:42,894 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:24:42,894 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:24:42,894 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:24:42,895 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:24:42,895 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:24:42,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:24:42,895 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:24:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-21 21:24:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:24:42,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:42,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:42,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2020-12-21 21:24:42,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:42,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531423173] [2020-12-21 21:24:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:43,190 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 21:24:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531423173] [2020-12-21 21:24:43,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:24:43,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:24:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86895440] [2020-12-21 21:24:43,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:43,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:24:43,229 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-12-21 21:24:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:43,292 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2020-12-21 21:24:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:43,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:24:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:43,313 INFO L225 Difference]: With dead ends: 64 [2020-12-21 21:24:43,314 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 21:24:43,317 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 21:24:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 21:24:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-21 21:24:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:24:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-21 21:24:43,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-21 21:24:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:43,364 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-21 21:24:43,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-21 21:24:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:24:43,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:43,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:43,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:24:43,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2020-12-21 21:24:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:43,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828782735] [2020-12-21 21:24:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:43,439 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 21:24:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828782735] [2020-12-21 21:24:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069689622] [2020-12-21 21:24:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:24:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:43,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:24:43,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:43,638 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 21:24:43,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:24:43,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:24:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740988724] [2020-12-21 21:24:43,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:43,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:43,646 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-21 21:24:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:43,751 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-12-21 21:24:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:43,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 21:24:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:43,753 INFO L225 Difference]: With dead ends: 64 [2020-12-21 21:24:43,753 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:24:43,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 21:24:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:24:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-21 21:24:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:24:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-21 21:24:43,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2020-12-21 21:24:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:43,764 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-21 21:24:43,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-21 21:24:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:24:43,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:43,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:43,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:24:43,981 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:43,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2020-12-21 21:24:43,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:43,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457197812] [2020-12-21 21:24:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:24:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457197812] [2020-12-21 21:24:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523891706] [2020-12-21 21:24:44,099 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 21:24:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:24:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:24:44,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:44,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:24:44,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232410045] [2020-12-21 21:24:44,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:24:44,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:24:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:44,254 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2020-12-21 21:24:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:44,280 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-12-21 21:24:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:24:44,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-21 21:24:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:44,283 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:24:44,283 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:24:44,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 21:24:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:24:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-21 21:24:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:24:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-21 21:24:44,291 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2020-12-21 21:24:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:44,292 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-21 21:24:44,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:24:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-21 21:24:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:24:44,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:44,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:44,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:44,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2053832611, now seen corresponding path program 2 times [2020-12-21 21:24:44,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:44,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189455601] [2020-12-21 21:24:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:24:44,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189455601] [2020-12-21 21:24:44,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458564106] [2020-12-21 21:24:44,639 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 21:24:44,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:24:44,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:44,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:24:44,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531939805] [2020-12-21 21:24:44,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:24:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:24:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:44,785 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-12-21 21:24:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:44,914 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-12-21 21:24:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:44,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:24:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:44,916 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:24:44,916 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:24:44,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 21:24:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:24:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-12-21 21:24:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:24:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-21 21:24:44,926 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2020-12-21 21:24:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:44,927 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-21 21:24:44,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:24:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-21 21:24:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:24:44,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:44,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:45,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:45,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1234669803, now seen corresponding path program 3 times [2020-12-21 21:24:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:45,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752839005] [2020-12-21 21:24:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:24:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752839005] [2020-12-21 21:24:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808693875] [2020-12-21 21:24:45,323 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 21:24:45,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:24:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-21 21:24:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:45,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:24:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385119393] [2020-12-21 21:24:45,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:24:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:24:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:24:45,531 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2020-12-21 21:24:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:45,720 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-21 21:24:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:24:45,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-12-21 21:24:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:45,727 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:24:45,727 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:24:45,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 21:24:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:24:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-12-21 21:24:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:24:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-12-21 21:24:45,745 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 49 [2020-12-21 21:24:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:45,745 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-12-21 21:24:45,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:24:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-12-21 21:24:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:24:45,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:45,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:45,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:45,962 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:45,963 INFO L82 PathProgramCache]: Analyzing trace with hash -283021561, now seen corresponding path program 4 times [2020-12-21 21:24:45,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:45,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453800767] [2020-12-21 21:24:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:24:46,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453800767] [2020-12-21 21:24:46,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496780755] [2020-12-21 21:24:46,150 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 21:24:46,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:24:46,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:46,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:24:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142416564] [2020-12-21 21:24:46,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:24:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:24:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:24:46,294 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 8 states. [2020-12-21 21:24:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:46,320 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-12-21 21:24:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:24:46,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-12-21 21:24:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:46,321 INFO L225 Difference]: With dead ends: 124 [2020-12-21 21:24:46,321 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:24:46,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 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 21:24:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:24:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-21 21:24:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:24:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-12-21 21:24:46,330 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 63 [2020-12-21 21:24:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:46,330 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-12-21 21:24:46,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:24:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-12-21 21:24:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:24:46,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:46,332 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:46,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:24:46,546 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 633176517, now seen corresponding path program 5 times [2020-12-21 21:24:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:46,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799618700] [2020-12-21 21:24:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:24:46,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799618700] [2020-12-21 21:24:46,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95058925] [2020-12-21 21:24:46,665 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 21:24:50,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:24:50,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:24:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:24:50,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:50,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:24:50,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315334265] [2020-12-21 21:24:50,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:50,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:50,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:50,378 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 12 states. [2020-12-21 21:24:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:50,551 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2020-12-21 21:24:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:24:50,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-21 21:24:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:50,553 INFO L225 Difference]: With dead ends: 144 [2020-12-21 21:24:50,553 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:24:50,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 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 21:24:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:24:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-12-21 21:24:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:24:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-12-21 21:24:50,562 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 65 [2020-12-21 21:24:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:50,563 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-12-21 21:24:50,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-12-21 21:24:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:24:50,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:50,564 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:50,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:50,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1580429897, now seen corresponding path program 6 times [2020-12-21 21:24:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:50,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423921723] [2020-12-21 21:24:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-21 21:24:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423921723] [2020-12-21 21:24:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280086540] [2020-12-21 21:24:50,925 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 21:24:51,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:24:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-21 21:24:51,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:51,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:24:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108206730] [2020-12-21 21:24:51,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:24:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:24:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:51,631 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 14 states. [2020-12-21 21:24:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:51,859 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-12-21 21:24:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:24:51,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-12-21 21:24:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:51,861 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:24:51,861 INFO L226 Difference]: Without dead ends: 103 [2020-12-21 21:24:51,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-21 21:24:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2020-12-21 21:24:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 21:24:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-12-21 21:24:51,874 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 79 [2020-12-21 21:24:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:51,874 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-12-21 21:24:51,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:24:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-12-21 21:24:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:24:51,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:51,877 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:52,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:52,092 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1164659241, now seen corresponding path program 7 times [2020-12-21 21:24:52,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:52,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62177123] [2020-12-21 21:24:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62177123] [2020-12-21 21:24:52,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245905497] [2020-12-21 21:24:52,205 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 21:24:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:24:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:52,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:52,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:24:52,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786029550] [2020-12-21 21:24:52,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:24:52,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:24:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:24:52,412 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 11 states. [2020-12-21 21:24:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:52,452 INFO L93 Difference]: Finished difference Result 178 states and 192 transitions. [2020-12-21 21:24:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:24:52,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-12-21 21:24:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:52,454 INFO L225 Difference]: With dead ends: 178 [2020-12-21 21:24:52,454 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:24:52,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 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 21:24:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:24:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-21 21:24:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:24:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-12-21 21:24:52,487 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 93 [2020-12-21 21:24:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:52,487 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-12-21 21:24:52,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:24:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-12-21 21:24:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:24:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:52,492 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:52,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:24:52,707 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:52,708 INFO L82 PathProgramCache]: Analyzing trace with hash -438272921, now seen corresponding path program 8 times [2020-12-21 21:24:52,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:52,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802221445] [2020-12-21 21:24:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:52,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802221445] [2020-12-21 21:24:52,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235266081] [2020-12-21 21:24:52,841 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 21:24:52,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:52,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:52,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:24:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:53,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:53,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:24:53,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311170110] [2020-12-21 21:24:53,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:53,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:53,041 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 12 states. [2020-12-21 21:24:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:53,079 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2020-12-21 21:24:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:24:53,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-12-21 21:24:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:53,081 INFO L225 Difference]: With dead ends: 180 [2020-12-21 21:24:53,081 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:24:53,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 21:24:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:24:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-21 21:24:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:24:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-12-21 21:24:53,088 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 95 [2020-12-21 21:24:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:53,089 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-12-21 21:24:53,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-12-21 21:24:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:24:53,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:53,090 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:53,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:53,305 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1037178661, now seen corresponding path program 9 times [2020-12-21 21:24:53,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:53,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799910178] [2020-12-21 21:24:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799910178] [2020-12-21 21:24:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611313785] [2020-12-21 21:24:53,475 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 21:24:54,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:24:54,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:24:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-21 21:24:55,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:55,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:24:55,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852833885] [2020-12-21 21:24:55,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:24:55,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:24:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:24:55,101 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 18 states. [2020-12-21 21:24:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:55,351 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-12-21 21:24:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:24:55,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-12-21 21:24:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:55,353 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:24:55,353 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:24:55,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 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 21:24:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:24:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-12-21 21:24:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-21 21:24:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-12-21 21:24:55,360 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 97 [2020-12-21 21:24:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:55,361 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-12-21 21:24:55,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:24:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-12-21 21:24:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 21:24:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:55,362 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:55,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:55,578 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1497810153, now seen corresponding path program 10 times [2020-12-21 21:24:55,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:55,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802134140] [2020-12-21 21:24:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 21:24:55,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802134140] [2020-12-21 21:24:55,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124892883] [2020-12-21 21:24:55,753 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 21:24:55,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:24:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 21:24:55,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:55,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:24:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779397494] [2020-12-21 21:24:55,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:24:55,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:24:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:24:55,985 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 14 states. [2020-12-21 21:24:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:56,032 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-12-21 21:24:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:24:56,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 111 [2020-12-21 21:24:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:56,034 INFO L225 Difference]: With dead ends: 208 [2020-12-21 21:24:56,035 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 21:24:56,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 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 21:24:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 21:24:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-12-21 21:24:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:24:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-12-21 21:24:56,045 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 111 [2020-12-21 21:24:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:56,045 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-12-21 21:24:56,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:24:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-12-21 21:24:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:24:56,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:56,050 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:56,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:24:56,264 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash 172595669, now seen corresponding path program 11 times [2020-12-21 21:24:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:56,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497808425] [2020-12-21 21:24:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 21:24:56,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497808425] [2020-12-21 21:24:56,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520443649] [2020-12-21 21:24:56,493 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