/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-cav19/array_min_and_copy_shift_sum_add.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:45:15,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:45:15,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:45:15,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:45:15,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:45:15,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:45:15,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:45:15,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:45:15,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:45:15,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:45:15,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:45:15,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:45:15,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:45:15,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:45:15,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:45:15,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:45:15,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:45:15,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:45:15,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:45:15,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:45:15,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:45:15,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:45:15,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:45:15,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:45:15,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:45:15,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:45:15,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:45:15,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:45:15,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:45:15,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:45:15,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:45:15,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:45:15,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:45:15,372 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:45:15,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:45:15,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:45:15,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:45:15,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:45:15,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:45:15,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:45:15,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:45:15,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:45:15,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:45:15,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:45:15,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:45:15,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:45:15,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:45:15,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:45:15,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:45:15,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:45:15,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:45:15,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:45:15,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:45:15,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:45:15,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:45:15,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:45:15,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:45:15,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:45:15,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:45:15,805 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:45:15,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2020-12-21 22:45:15,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a95a62b/b9ab4caa2ba04f09b4f9cf3ae1503bcc/FLAG430c9e0e3 [2020-12-21 22:45:16,551 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:45:16,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2020-12-21 22:45:16,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a95a62b/b9ab4caa2ba04f09b4f9cf3ae1503bcc/FLAG430c9e0e3 [2020-12-21 22:45:16,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a95a62b/b9ab4caa2ba04f09b4f9cf3ae1503bcc [2020-12-21 22:45:16,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:45:16,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:45:16,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:45:16,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:45:16,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:45:16,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:45:16" (1/1) ... [2020-12-21 22:45:16,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561f746f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:16, skipping insertion in model container [2020-12-21 22:45:16,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:45:16" (1/1) ... [2020-12-21 22:45:16,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:45:16,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:45:17,096 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2020-12-21 22:45:17,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:45:17,129 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:45:17,145 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2020-12-21 22:45:17,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:45:17,172 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:45:17,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17 WrapperNode [2020-12-21 22:45:17,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:45:17,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:45:17,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:45:17,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:45:17,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:45:17,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:45:17,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:45:17,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:45:17,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (1/1) ... [2020-12-21 22:45:17,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:45:17,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:45:17,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:45:17,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:45:17,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (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 22:45:17,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:45:17,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:45:17,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:45:17,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:45:17,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:45:17,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:45:17,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:45:17,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:45:17,944 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:45:17,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:45:17 BoogieIcfgContainer [2020-12-21 22:45:17,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:45:17,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:45:17,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:45:17,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:45:17,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:45:16" (1/3) ... [2020-12-21 22:45:17,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a5ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:45:17, skipping insertion in model container [2020-12-21 22:45:17,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:45:17" (2/3) ... [2020-12-21 22:45:17,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a5ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:45:17, skipping insertion in model container [2020-12-21 22:45:17,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:45:17" (3/3) ... [2020-12-21 22:45:17,955 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2020-12-21 22:45:17,961 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:45:17,966 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:45:17,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:45:18,016 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:45:18,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:45:18,016 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:45:18,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:45:18,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:45:18,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:45:18,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:45:18,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:45:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 22:45:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:45:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:18,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:18,039 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1074116968, now seen corresponding path program 1 times [2020-12-21 22:45:18,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:18,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279428036] [2020-12-21 22:45:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:18,222 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 22:45:18,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279428036] [2020-12-21 22:45:18,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:45:18,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:45:18,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491029604] [2020-12-21 22:45:18,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:45:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:45:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:45:18,250 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 22:45:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:18,270 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-12-21 22:45:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:45:18,271 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-21 22:45:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:18,281 INFO L225 Difference]: With dead ends: 51 [2020-12-21 22:45:18,282 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:45:18,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:45:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:45:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 22:45:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:45:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-21 22:45:18,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-12-21 22:45:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:18,324 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-21 22:45:18,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:45:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-21 22:45:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:45:18,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:18,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:18,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:45:18,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1208978540, now seen corresponding path program 1 times [2020-12-21 22:45:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:18,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800701972] [2020-12-21 22:45:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:18,451 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 22:45:18,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800701972] [2020-12-21 22:45:18,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:45:18,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:45:18,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760953508] [2020-12-21 22:45:18,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:45:18,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:18,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:45:18,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:45:18,456 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-12-21 22:45:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:18,504 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-21 22:45:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:45:18,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:45:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:18,506 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:45:18,506 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 22:45:18,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:45:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 22:45:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-21 22:45:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:45:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 22:45:18,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-12-21 22:45:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:18,513 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 22:45:18,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:45:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 22:45:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:45:18,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:18,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:18,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:45:18,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2133972746, now seen corresponding path program 1 times [2020-12-21 22:45:18,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:18,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746506768] [2020-12-21 22:45:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746506768] [2020-12-21 22:45:18,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:45:18,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:45:18,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170467246] [2020-12-21 22:45:18,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:45:18,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:45:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:45:18,626 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-21 22:45:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:18,755 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-21 22:45:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:45:18,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:45:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:18,757 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:45:18,758 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 22:45:18,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:45:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 22:45:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-12-21 22:45:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:45:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-21 22:45:18,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-12-21 22:45:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:18,764 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-21 22:45:18,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:45:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-21 22:45:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:45:18,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:18,766 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] [2020-12-21 22:45:18,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:45:18,766 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1668746636, now seen corresponding path program 1 times [2020-12-21 22:45:18,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:18,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872360024] [2020-12-21 22:45:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872360024] [2020-12-21 22:45:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664756810] [2020-12-21 22:45:19,324 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 22:45:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:45:19,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:19,667 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:19,667 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 42 [2020-12-21 22:45:19,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:19,703 INFO L625 ElimStorePlain]: treesize reduction 16, result has 66.0 percent of original size [2020-12-21 22:45:19,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:19,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:14 [2020-12-21 22:45:19,790 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:45:19,795 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:19,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:19,800 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:19,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-21 22:45:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:19,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:19,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-12-21 22:45:19,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144344291] [2020-12-21 22:45:19,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:45:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:45:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:45:19,855 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 18 states. [2020-12-21 22:45:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:20,356 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-12-21 22:45:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:45:20,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-12-21 22:45:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:20,358 INFO L225 Difference]: With dead ends: 53 [2020-12-21 22:45:20,358 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 22:45:20,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:45:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 22:45:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-12-21 22:45:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:45:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-12-21 22:45:20,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2020-12-21 22:45:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:20,368 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-12-21 22:45:20,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:45:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-12-21 22:45:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:45:20,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:20,369 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] [2020-12-21 22:45:20,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:20,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash 657629386, now seen corresponding path program 1 times [2020-12-21 22:45:20,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:20,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881129002] [2020-12-21 22:45:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:20,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881129002] [2020-12-21 22:45:20,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128451538] [2020-12-21 22:45:20,944 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 22:45:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:45:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:21,320 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:21,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 42 [2020-12-21 22:45:21,324 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:21,359 INFO L625 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2020-12-21 22:45:21,365 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:21,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:14 [2020-12-21 22:45:21,434 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:45:21,436 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:21,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:21,438 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:21,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-21 22:45:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:21,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:21,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2020-12-21 22:45:21,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673326046] [2020-12-21 22:45:21,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:45:21,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:45:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:45:21,469 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 22 states. [2020-12-21 22:45:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:22,204 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-12-21 22:45:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:45:22,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-21 22:45:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:22,208 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:45:22,208 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:45:22,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:45:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:45:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2020-12-21 22:45:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:45:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-12-21 22:45:22,235 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2020-12-21 22:45:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:22,236 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-12-21 22:45:22,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:45:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-12-21 22:45:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:45:22,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:22,239 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] [2020-12-21 22:45:22,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:22,452 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1695950062, now seen corresponding path program 2 times [2020-12-21 22:45:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:22,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671371251] [2020-12-21 22:45:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:45:22,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671371251] [2020-12-21 22:45:22,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881120334] [2020-12-21 22:45:22,580 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 22:45:22,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:45:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:22,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:45:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:45:22,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:22,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-21 22:45:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974536205] [2020-12-21 22:45:22,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:45:22,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:45:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:45:22,730 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 10 states. [2020-12-21 22:45:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:22,875 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-12-21 22:45:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:45:22,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-21 22:45:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:22,877 INFO L225 Difference]: With dead ends: 88 [2020-12-21 22:45:22,877 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 22:45:22,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:45:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 22:45:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-12-21 22:45:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:45:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-21 22:45:22,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 27 [2020-12-21 22:45:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:22,888 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-21 22:45:22,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:45:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-21 22:45:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 22:45:22,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:22,889 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:23,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:23,104 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash 573504280, now seen corresponding path program 3 times [2020-12-21 22:45:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:23,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010077014] [2020-12-21 22:45:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:45:23,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010077014] [2020-12-21 22:45:23,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547689147] [2020-12-21 22:45:23,196 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 22:45:23,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:45:23,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:45:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:45:23,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:23,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-21 22:45:23,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382532578] [2020-12-21 22:45:23,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:45:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:45:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:45:23,354 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 10 states. [2020-12-21 22:45:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:23,530 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-12-21 22:45:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:45:23,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-21 22:45:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:23,531 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:45:23,531 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:45:23,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:45:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:45:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-12-21 22:45:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 22:45:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-21 22:45:23,538 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2020-12-21 22:45:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:23,538 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-21 22:45:23,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:45:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-21 22:45:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:45:23,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:23,540 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:23,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:23,754 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -964146404, now seen corresponding path program 4 times [2020-12-21 22:45:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:23,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936958994] [2020-12-21 22:45:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:24,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936958994] [2020-12-21 22:45:24,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289367951] [2020-12-21 22:45:24,767 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 22:45:24,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:45:24,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:45:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:24,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:45:24,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:24,909 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:24,910 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:24,910 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:45:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:25,287 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2020-12-21 22:45:25,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:25,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:25,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:25,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:64 [2020-12-21 22:45:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:25,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 44 [2020-12-21 22:45:25,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:25,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:25,460 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:45:25,460 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:56 [2020-12-21 22:45:25,807 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2020-12-21 22:45:25,810 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:25,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:25,817 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:25,818 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:3 [2020-12-21 22:45:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:25,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:25,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2020-12-21 22:45:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796043280] [2020-12-21 22:45:25,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:45:25,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:45:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:45:25,890 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 36 states. [2020-12-21 22:45:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:28,242 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-12-21 22:45:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 22:45:28,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2020-12-21 22:45:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:28,243 INFO L225 Difference]: With dead ends: 84 [2020-12-21 22:45:28,243 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 22:45:28,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 22:45:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 22:45:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-12-21 22:45:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 22:45:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-21 22:45:28,255 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 36 [2020-12-21 22:45:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:28,256 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-21 22:45:28,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:45:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-21 22:45:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:45:28,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:28,257 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:28,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:28,472 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1336676186, now seen corresponding path program 1 times [2020-12-21 22:45:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:28,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104329891] [2020-12-21 22:45:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104329891] [2020-12-21 22:45:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953414237] [2020-12-21 22:45:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:45:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:29,615 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:45:29,617 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:29,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:29,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:29,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:45:29,916 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:29,919 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2020-12-21 22:45:29,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:29,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:29,941 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:29,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:58 [2020-12-21 22:45:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:30,131 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2020-12-21 22:45:30,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:30,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:30,152 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:45:30,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:52 [2020-12-21 22:45:30,530 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2020-12-21 22:45:30,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:30,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:30,537 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:30,537 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:3 [2020-12-21 22:45:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:30,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:30,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2020-12-21 22:45:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136366910] [2020-12-21 22:45:30,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:45:30,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:45:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:45:30,593 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 36 states. [2020-12-21 22:45:31,738 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-21 22:45:32,034 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-12-21 22:45:33,215 WARN L197 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-12-21 22:45:33,429 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-21 22:45:33,662 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-21 22:45:34,996 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-21 22:45:36,174 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-12-21 22:45:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:36,768 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-12-21 22:45:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:45:36,768 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2020-12-21 22:45:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:36,769 INFO L225 Difference]: With dead ends: 96 [2020-12-21 22:45:36,769 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:45:36,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=484, Invalid=3056, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 22:45:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:45:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2020-12-21 22:45:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 22:45:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-12-21 22:45:36,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 36 [2020-12-21 22:45:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:36,783 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-12-21 22:45:36,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:45:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-12-21 22:45:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:45:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:36,784 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:36,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:36,997 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -823597794, now seen corresponding path program 2 times [2020-12-21 22:45:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:36,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868770108] [2020-12-21 22:45:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868770108] [2020-12-21 22:45:37,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467456318] [2020-12-21 22:45:37,878 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 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 22:45:37,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:45:37,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 22:45:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:37,986 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:37,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:45:37,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:38,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:38,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:38,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2020-12-21 22:45:38,441 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:38,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2020-12-21 22:45:38,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:38,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:38,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:38,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:66 [2020-12-21 22:45:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:38,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 44 [2020-12-21 22:45:38,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:38,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:38,657 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:45:38,657 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:64 [2020-12-21 22:45:38,995 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2020-12-21 22:45:39,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:39,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:39,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:39,007 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:9 [2020-12-21 22:45:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:39,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:39,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2020-12-21 22:45:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547093060] [2020-12-21 22:45:39,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 22:45:39,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 22:45:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:45:39,088 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 38 states. [2020-12-21 22:45:40,591 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-12-21 22:45:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:43,084 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-12-21 22:45:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 22:45:43,084 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 36 [2020-12-21 22:45:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:43,086 INFO L225 Difference]: With dead ends: 138 [2020-12-21 22:45:43,086 INFO L226 Difference]: Without dead ends: 132 [2020-12-21 22:45:43,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 22:45:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-21 22:45:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 78. [2020-12-21 22:45:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 22:45:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-12-21 22:45:43,100 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 36 [2020-12-21 22:45:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:43,101 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-12-21 22:45:43,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 22:45:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-12-21 22:45:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:45:43,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:43,102 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:43,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:45:43,318 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1477224796, now seen corresponding path program 2 times [2020-12-21 22:45:43,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:43,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303729586] [2020-12-21 22:45:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:44,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303729586] [2020-12-21 22:45:44,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086479361] [2020-12-21 22:45:44,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:44,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:45:44,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:45:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:44,588 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:44,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:45:44,592 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:44,603 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:44,604 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:44,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2020-12-21 22:45:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:45,064 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2020-12-21 22:45:45,066 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:45,086 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:45,087 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:45,087 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:58 [2020-12-21 22:45:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:45,263 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2020-12-21 22:45:45,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:45,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:45,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:45:45,308 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:52 [2020-12-21 22:45:45,749 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2020-12-21 22:45:45,751 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:45,755 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:45,756 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:45,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:3 [2020-12-21 22:45:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:45,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:45,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2020-12-21 22:45:45,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684846581] [2020-12-21 22:45:45,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 22:45:45,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:45,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 22:45:45,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 22:45:45,822 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 39 states. [2020-12-21 22:45:49,236 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2020-12-21 22:45:50,823 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-21 22:45:52,008 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-12-21 22:45:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:53,012 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2020-12-21 22:45:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 22:45:53,012 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 36 [2020-12-21 22:45:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:53,014 INFO L225 Difference]: With dead ends: 131 [2020-12-21 22:45:53,014 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 22:45:53,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=548, Invalid=4422, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 22:45:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 22:45:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 60. [2020-12-21 22:45:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 22:45:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-12-21 22:45:53,027 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 36 [2020-12-21 22:45:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:53,027 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-12-21 22:45:53,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 22:45:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-12-21 22:45:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 22:45:53,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:53,029 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:53,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:45:53,244 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1221475966, now seen corresponding path program 5 times [2020-12-21 22:45:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:53,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386195098] [2020-12-21 22:45:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:45:53,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386195098] [2020-12-21 22:45:53,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057297971] [2020-12-21 22:45:53,332 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 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 22:45:53,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:45:53,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:45:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:45:53,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:53,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:45:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366788440] [2020-12-21 22:45:53,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:45:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:45:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:45:53,513 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 13 states. [2020-12-21 22:45:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:53,682 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-12-21 22:45:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:45:53,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-12-21 22:45:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:53,684 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:45:53,684 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:45:53,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:45:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:45:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2020-12-21 22:45:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:45:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-12-21 22:45:53,697 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 38 [2020-12-21 22:45:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:53,697 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-12-21 22:45:53,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:45:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-12-21 22:45:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:45:53,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:53,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:53,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:53,913 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:53,914 INFO L82 PathProgramCache]: Analyzing trace with hash 716221968, now seen corresponding path program 6 times [2020-12-21 22:45:53,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:53,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468908503] [2020-12-21 22:45:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:45:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468908503] [2020-12-21 22:45:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124219131] [2020-12-21 22:45:53,995 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 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 22:45:54,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:45:54,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:45:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:45:54,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:54,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:45:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791130725] [2020-12-21 22:45:54,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:45:54,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:45:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:45:54,184 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 13 states. [2020-12-21 22:45:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:54,414 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-21 22:45:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:45:54,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-12-21 22:45:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:54,415 INFO L225 Difference]: With dead ends: 81 [2020-12-21 22:45:54,416 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:45:54,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:45:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:45:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-12-21 22:45:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:45:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-21 22:45:54,425 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 43 [2020-12-21 22:45:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:54,425 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-21 22:45:54,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:45:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-21 22:45:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:45:54,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:54,426 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:45:54,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:54,641 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1851731436, now seen corresponding path program 7 times [2020-12-21 22:45:54,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450734886] [2020-12-21 22:45:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:56,101 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-21 22:45:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:56,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450734886] [2020-12-21 22:45:56,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267497770] [2020-12-21 22:45:56,671 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 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 22:45:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 22:45:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:56,817 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:45:56,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:56,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:56,833 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:56,833 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:45:57,468 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2020-12-21 22:45:57,477 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:57,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:57,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:57,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:79 [2020-12-21 22:45:57,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,699 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:45:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2020-12-21 22:45:57,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:57,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:57,735 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:57,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:92 [2020-12-21 22:45:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:45:57,973 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 70 [2020-12-21 22:45:57,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:57,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:58,000 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:45:58,000 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:100 [2020-12-21 22:45:58,809 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 31 [2020-12-21 22:45:58,814 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:58,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:58,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:58,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:9 [2020-12-21 22:45:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:58,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2020-12-21 22:45:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711308307] [2020-12-21 22:45:58,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:45:58,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:45:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:45:58,926 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 50 states. [2020-12-21 22:46:00,082 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-21 22:46:00,278 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-21 22:46:01,053 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-12-21 22:46:01,499 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-21 22:46:01,895 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-12-21 22:46:02,206 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-12-21 22:46:02,588 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2020-12-21 22:46:02,964 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-12-21 22:46:04,603 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 135 DAG size of output: 72 [2020-12-21 22:46:04,890 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-12-21 22:46:05,144 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-21 22:46:05,473 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-12-21 22:46:06,649 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-12-21 22:46:06,893 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-21 22:46:07,134 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-12-21 22:46:07,386 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-12-21 22:46:07,573 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-21 22:46:07,844 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-21 22:46:08,230 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-21 22:46:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:08,241 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-12-21 22:46:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:46:08,242 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2020-12-21 22:46:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:08,243 INFO L225 Difference]: With dead ends: 99 [2020-12-21 22:46:08,243 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 22:46:08,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=700, Invalid=6106, Unknown=0, NotChecked=0, Total=6806 [2020-12-21 22:46:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 22:46:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-12-21 22:46:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 22:46:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-21 22:46:08,259 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 47 [2020-12-21 22:46:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:08,259 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-21 22:46:08,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:46:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-21 22:46:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:46:08,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:08,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:08,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:46:08,464 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1632876718, now seen corresponding path program 3 times [2020-12-21 22:46:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:08,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318404327] [2020-12-21 22:46:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318404327] [2020-12-21 22:46:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972942593] [2020-12-21 22:46:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:10,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:46:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-21 22:46:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:10,498 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:10,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:46:10,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:10,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:10,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:10,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2020-12-21 22:46:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:46:11,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:11,769 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:11,770 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 92 [2020-12-21 22:46:11,776 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:11,872 INFO L625 ElimStorePlain]: treesize reduction 38, result has 71.9 percent of original size [2020-12-21 22:46:11,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:11,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:99, output treesize:97 [2020-12-21 22:46:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,234 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:12,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 136 [2020-12-21 22:46:12,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,357 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-21 22:46:12,358 INFO L625 ElimStorePlain]: treesize reduction 91, result has 53.8 percent of original size [2020-12-21 22:46:12,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:12,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:112, output treesize:106 [2020-12-21 22:46:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:12,750 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:12,751 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 145 [2020-12-21 22:46:12,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,877 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-21 22:46:12,878 INFO L625 ElimStorePlain]: treesize reduction 85, result has 66.8 percent of original size [2020-12-21 22:46:12,882 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:12,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:181, output treesize:171 [2020-12-21 22:46:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:14,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:46:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:46:14,254 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:14,255 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 64 [2020-12-21 22:46:14,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,295 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,309 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,317 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,321 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,328 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,342 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,412 INFO L547 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:14,574 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-21 22:46:14,575 INFO L625 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2020-12-21 22:46:14,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,593 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:14,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:145, output treesize:115 [2020-12-21 22:46:14,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,857 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:46:14,879 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-21 22:46:14,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:46:14,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:14,896 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-21 22:46:14,906 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-21 22:46:14,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:46:14,910 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-21 22:46:14,918 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-21 22:46:14,930 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-21 22:46:14,937 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-21 22:46:15,486 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-12-21 22:46:15,495 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-21 22:46:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:15,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:15,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2020-12-21 22:46:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041746444] [2020-12-21 22:46:15,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 22:46:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 22:46:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2755, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:46:15,683 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 55 states. [2020-12-21 22:46:17,542 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-21 22:46:18,495 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-12-21 22:46:18,856 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-12-21 22:46:20,040 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-12-21 22:46:20,303 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-12-21 22:46:20,536 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-12-21 22:46:20,760 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-12-21 22:46:24,754 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-12-21 22:46:25,044 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-12-21 22:46:25,323 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-12-21 22:46:25,830 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-12-21 22:46:26,100 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-12-21 22:46:26,436 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-12-21 22:46:28,588 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2020-12-21 22:46:29,007 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-21 22:46:29,698 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-12-21 22:46:29,913 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-12-21 22:46:30,126 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-21 22:46:31,186 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-12-21 22:46:33,507 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-12-21 22:46:34,103 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-12-21 22:46:34,360 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-21 22:46:34,641 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-21 22:46:34,919 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 73 [2020-12-21 22:46:35,178 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-21 22:46:35,663 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-12-21 22:46:35,958 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-12-21 22:46:36,205 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-12-21 22:46:36,471 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-21 22:46:36,730 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-21 22:46:37,245 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 67 [2020-12-21 22:46:37,432 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-21 22:46:37,652 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-12-21 22:46:37,861 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-12-21 22:46:38,094 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-21 22:46:38,423 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-12-21 22:46:38,868 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-21 22:46:39,216 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 68 [2020-12-21 22:46:39,484 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-21 22:46:39,799 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2020-12-21 22:46:40,033 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-21 22:46:40,675 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 71 [2020-12-21 22:46:40,987 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-21 22:46:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:41,314 INFO L93 Difference]: Finished difference Result 252 states and 306 transitions. [2020-12-21 22:46:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-21 22:46:41,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 47 [2020-12-21 22:46:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:41,316 INFO L225 Difference]: With dead ends: 252 [2020-12-21 22:46:41,316 INFO L226 Difference]: Without dead ends: 226 [2020-12-21 22:46:41,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5909 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1741, Invalid=18565, Unknown=0, NotChecked=0, Total=20306 [2020-12-21 22:46:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-21 22:46:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 109. [2020-12-21 22:46:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:46:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2020-12-21 22:46:41,343 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 47 [2020-12-21 22:46:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:41,343 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-12-21 22:46:41,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 22:46:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2020-12-21 22:46:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:46:41,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:41,344 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:41,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:46:41,552 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash -465528042, now seen corresponding path program 4 times [2020-12-21 22:46:41,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:41,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596156901] [2020-12-21 22:46:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:42,640 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-21 22:46:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:43,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596156901] [2020-12-21 22:46:43,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940911887] [2020-12-21 22:46:43,670 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 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 22:46:43,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:46:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 22:46:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:43,800 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:46:43,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:43,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:43,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:43,815 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:46:44,753 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:46:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:44,759 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2020-12-21 22:46:44,761 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:44,794 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:44,796 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:44,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:79 [2020-12-21 22:46:45,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,068 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:46:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,071 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2020-12-21 22:46:45,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:45,115 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:45,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:45,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2020-12-21 22:46:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:46:45,432 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 70 [2020-12-21 22:46:45,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:45,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:45,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:45,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:114 [2020-12-21 22:46:46,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 35 [2020-12-21 22:46:46,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:46,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:46,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:46,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:111, output treesize:9 [2020-12-21 22:46:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:46,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:46,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2020-12-21 22:46:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878027148] [2020-12-21 22:46:46,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:46:46,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:46:46,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:46:46,656 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand 50 states. [2020-12-21 22:46:48,885 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-12-21 22:46:49,838 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-21 22:46:50,091 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2020-12-21 22:46:50,366 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 42 [2020-12-21 22:46:50,577 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-12-21 22:46:50,749 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-21 22:46:50,982 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-12-21 22:46:51,195 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-21 22:46:51,726 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 60 [2020-12-21 22:46:52,173 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-12-21 22:46:54,087 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-12-21 22:46:54,445 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-12-21 22:46:54,639 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-12-21 22:46:55,033 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-12-21 22:46:55,245 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-21 22:46:55,501 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-12-21 22:46:55,899 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-21 22:46:56,110 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-21 22:46:56,367 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-12-21 22:46:56,676 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-12-21 22:46:56,941 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-21 22:46:57,106 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-12-21 22:46:57,356 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-21 22:46:57,615 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-21 22:46:57,865 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-12-21 22:46:58,247 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-21 22:46:58,621 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-21 22:46:58,869 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-21 22:46:59,423 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-21 22:46:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:59,751 INFO L93 Difference]: Finished difference Result 220 states and 265 transitions. [2020-12-21 22:46:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 22:46:59,752 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2020-12-21 22:46:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:59,753 INFO L225 Difference]: With dead ends: 220 [2020-12-21 22:46:59,753 INFO L226 Difference]: Without dead ends: 214 [2020-12-21 22:46:59,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3474 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1085, Invalid=10471, Unknown=0, NotChecked=0, Total=11556 [2020-12-21 22:46:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-21 22:46:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 130. [2020-12-21 22:46:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-21 22:46:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2020-12-21 22:46:59,782 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 47 [2020-12-21 22:46:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:59,783 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2020-12-21 22:46:59,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:46:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2020-12-21 22:46:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:46:59,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:59,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:59,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:46:59,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:00,000 INFO L82 PathProgramCache]: Analyzing trace with hash -246673324, now seen corresponding path program 5 times [2020-12-21 22:47:00,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:00,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168627620] [2020-12-21 22:47:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:01,410 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-21 22:47:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:02,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168627620] [2020-12-21 22:47:02,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448268587] [2020-12-21 22:47:02,095 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 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 22:47:02,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:47:02,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:47:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:02,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:47:02,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:02,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:02,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:02,262 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:47:03,207 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 54 [2020-12-21 22:47:03,216 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:03,248 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:03,250 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:03,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:67 [2020-12-21 22:47:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2020-12-21 22:47:03,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:03,584 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:03,585 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:03,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:97, output treesize:93 [2020-12-21 22:47:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:03,923 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 70 [2020-12-21 22:47:03,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:03,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:03,958 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:03,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:98 [2020-12-21 22:47:04,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 33 [2020-12-21 22:47:04,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:04,990 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:04,992 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:04,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:3 [2020-12-21 22:47:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:05,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:05,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2020-12-21 22:47:05,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453783149] [2020-12-21 22:47:05,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:47:05,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:05,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:47:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:47:05,111 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 50 states. [2020-12-21 22:47:07,057 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-12-21 22:47:07,320 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-12-21 22:47:07,599 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-12-21 22:47:08,818 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-12-21 22:47:09,115 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-12-21 22:47:09,515 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-12-21 22:47:11,399 WARN L197 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2020-12-21 22:47:11,659 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-12-21 22:47:12,246 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-12-21 22:47:12,513 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-12-21 22:47:12,832 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-12-21 22:47:14,581 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-12-21 22:47:14,949 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-21 22:47:15,133 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-21 22:47:15,406 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-21 22:47:15,654 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-12-21 22:47:15,872 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-21 22:47:16,073 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-21 22:47:16,460 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-21 22:47:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:16,528 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2020-12-21 22:47:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 22:47:16,528 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2020-12-21 22:47:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:16,530 INFO L225 Difference]: With dead ends: 173 [2020-12-21 22:47:16,530 INFO L226 Difference]: Without dead ends: 167 [2020-12-21 22:47:16,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=692, Invalid=6790, Unknown=0, NotChecked=0, Total=7482 [2020-12-21 22:47:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-21 22:47:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2020-12-21 22:47:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 22:47:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2020-12-21 22:47:16,552 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 47 [2020-12-21 22:47:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:16,552 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2020-12-21 22:47:16,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:47:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2020-12-21 22:47:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:47:16,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:16,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:16,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:16,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2048869074, now seen corresponding path program 6 times [2020-12-21 22:47:16,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032462392] [2020-12-21 22:47:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:18,196 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-12-21 22:47:18,358 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-12-21 22:47:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:19,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032462392] [2020-12-21 22:47:19,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659862616] [2020-12-21 22:47:19,255 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 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 22:47:19,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:47:19,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-21 22:47:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:19,545 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:19,545 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:47:19,549 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:19,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:19,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:19,571 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2020-12-21 22:47:21,234 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,241 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2020-12-21 22:47:21,243 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:21,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:21,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:21,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:85 [2020-12-21 22:47:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:21,673 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:21,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 101 [2020-12-21 22:47:21,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:21,791 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-21 22:47:21,792 INFO L625 ElimStorePlain]: treesize reduction 48, result has 66.2 percent of original size [2020-12-21 22:47:21,794 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:21,794 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:94 [2020-12-21 22:47:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,267 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:22,280 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 81 [2020-12-21 22:47:22,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:22,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:22,341 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:22,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:140, output treesize:133 [2020-12-21 22:47:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:23,590 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:23,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:23,595 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:23,597 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 31 [2020-12-21 22:47:23,603 INFO L547 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:23,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:23,628 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:23,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:21 [2020-12-21 22:47:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:23,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:23,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2020-12-21 22:47:23,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873100566] [2020-12-21 22:47:23,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 22:47:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 22:47:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2762, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:47:23,839 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand 55 states. [2020-12-21 22:47:26,811 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-12-21 22:47:27,041 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-12-21 22:47:27,768 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-21 22:47:28,291 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-12-21 22:47:28,678 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2020-12-21 22:47:29,138 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-12-21 22:47:29,517 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 48 [2020-12-21 22:47:32,183 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2020-12-21 22:47:32,738 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-12-21 22:47:32,943 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-21 22:47:33,548 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-21 22:47:33,908 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-12-21 22:47:34,178 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-21 22:47:34,509 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-12-21 22:47:34,806 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-12-21 22:47:35,179 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2020-12-21 22:47:35,452 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-12-21 22:47:35,830 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-12-21 22:47:36,136 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-21 22:47:36,464 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-12-21 22:47:36,802 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-12-21 22:47:37,112 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-21 22:47:37,728 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-21 22:47:38,228 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-21 22:47:38,586 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-21 22:47:38,791 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-21 22:47:39,084 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-21 22:47:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:39,264 INFO L93 Difference]: Finished difference Result 250 states and 301 transitions. [2020-12-21 22:47:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 22:47:39,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 47 [2020-12-21 22:47:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:39,265 INFO L225 Difference]: With dead ends: 250 [2020-12-21 22:47:39,266 INFO L226 Difference]: Without dead ends: 219 [2020-12-21 22:47:39,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1020, Invalid=10536, Unknown=0, NotChecked=0, Total=11556 [2020-12-21 22:47:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-21 22:47:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2020-12-21 22:47:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 22:47:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2020-12-21 22:47:39,292 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 47 [2020-12-21 22:47:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:39,293 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2020-12-21 22:47:39,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 22:47:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2020-12-21 22:47:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:47:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:39,294 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:39,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:47:39,507 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2027243504, now seen corresponding path program 7 times [2020-12-21 22:47:39,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157903335] [2020-12-21 22:47:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:40,760 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-21 22:47:40,976 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-12-21 22:47:41,159 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-12-21 22:47:41,341 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-21 22:47:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:42,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157903335] [2020-12-21 22:47:42,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531352629] [2020-12-21 22:47:42,181 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 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 22:47:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 22:47:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:42,553 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:47:42,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:42,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:42,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:42,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-21 22:47:43,988 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:43,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:43,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:43,994 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 62 [2020-12-21 22:47:43,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:44,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:44,046 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:44,046 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:98 [2020-12-21 22:47:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:47:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,443 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 85 [2020-12-21 22:47:44,446 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:44,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:44,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:44,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:129, output treesize:130 [2020-12-21 22:47:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:47:44,951 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 78 [2020-12-21 22:47:44,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:45,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:45,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:45,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:123, output treesize:108 [2020-12-21 22:47:46,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2020-12-21 22:47:46,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:46,329 INFO L625 ElimStorePlain]: treesize reduction 9, result has 60.9 percent of original size [2020-12-21 22:47:46,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:46,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:111, output treesize:9 [2020-12-21 22:47:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:46,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:46,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 54 [2020-12-21 22:47:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706242397] [2020-12-21 22:47:46,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 22:47:46,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 22:47:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2679, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:47:46,548 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand 54 states. [2020-12-21 22:47:48,900 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-21 22:47:49,315 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-21 22:47:50,073 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-12-21 22:47:50,392 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-21 22:47:50,623 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-12-21 22:47:51,015 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-21 22:47:51,309 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-12-21 22:47:52,335 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-12-21 22:47:53,150 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-21 22:47:53,438 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-12-21 22:47:53,782 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-21 22:47:54,137 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2020-12-21 22:47:54,482 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-12-21 22:47:55,044 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-12-21 22:47:55,355 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-21 22:47:55,842 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2020-12-21 22:47:56,278 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-12-21 22:47:56,733 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 62 [2020-12-21 22:47:57,080 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-12-21 22:47:59,888 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-12-21 22:48:00,330 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-21 22:48:00,792 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-12-21 22:48:00,999 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-12-21 22:48:01,292 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-12-21 22:48:01,651 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-12-21 22:48:02,061 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-21 22:48:02,385 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-12-21 22:48:02,627 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-21 22:48:02,978 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-12-21 22:48:03,518 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-21 22:48:04,194 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-21 22:48:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:04,330 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2020-12-21 22:48:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:48:04,330 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 47 [2020-12-21 22:48:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:04,332 INFO L225 Difference]: With dead ends: 261 [2020-12-21 22:48:04,332 INFO L226 Difference]: Without dead ends: 255 [2020-12-21 22:48:04,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=944, Invalid=11266, Unknown=0, NotChecked=0, Total=12210 [2020-12-21 22:48:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-21 22:48:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 153. [2020-12-21 22:48:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 22:48:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2020-12-21 22:48:04,369 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 47 [2020-12-21 22:48:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:04,369 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2020-12-21 22:48:04,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 22:48:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2020-12-21 22:48:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:48:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:04,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:48:04,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:04,572 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -859894828, now seen corresponding path program 8 times [2020-12-21 22:48:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:04,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105744134] [2020-12-21 22:48:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:05,244 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-21 22:48:05,384 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-21 22:48:05,945 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-21 22:48:06,149 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-21 22:48:06,352 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-21 22:48:06,534 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-21 22:48:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105744134] [2020-12-21 22:48:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221582513] [2020-12-21 22:48:07,405 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 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 22:48:07,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:48:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-21 22:48:07,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:07,560 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:07,561 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:48:07,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:07,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:07,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:07,582 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2020-12-21 22:48:08,900 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:48:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:08,907 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2020-12-21 22:48:08,909 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:08,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:08,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:08,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:81 [2020-12-21 22:48:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:48:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2020-12-21 22:48:09,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:09,380 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:09,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:09,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:92 [2020-12-21 22:48:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:09,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 70 [2020-12-21 22:48:09,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:09,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:09,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:48:09,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:105, output treesize:98 [2020-12-21 22:48:11,035 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 31 [2020-12-21 22:48:11,039 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:11,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:11,053 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:11,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:9 [2020-12-21 22:48:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:11,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:11,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2020-12-21 22:48:11,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788115344] [2020-12-21 22:48:11,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 22:48:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 22:48:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2441, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:48:11,262 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 52 states. [2020-12-21 22:48:12,121 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-21 22:48:12,362 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-21 22:48:12,994 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-21 22:48:13,418 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-21 22:48:14,101 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-12-21 22:48:14,354 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-12-21 22:48:14,988 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-12-21 22:48:15,236 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-12-21 22:48:15,604 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-12-21 22:48:15,951 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2020-12-21 22:48:16,324 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2020-12-21 22:48:16,720 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-12-21 22:48:19,162 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-12-21 22:48:19,496 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-12-21 22:48:20,166 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-12-21 22:48:20,510 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-12-21 22:48:22,890 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2020-12-21 22:48:23,096 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-12-21 22:48:25,408 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-12-21 22:48:25,899 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-12-21 22:48:26,151 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-21 22:48:26,530 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-12-21 22:48:26,886 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-21 22:48:27,162 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-21 22:48:27,424 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-21 22:48:27,925 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-21 22:48:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:48:28,008 INFO L93 Difference]: Finished difference Result 250 states and 303 transitions. [2020-12-21 22:48:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 22:48:28,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 47 [2020-12-21 22:48:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:48:28,009 INFO L225 Difference]: With dead ends: 250 [2020-12-21 22:48:28,009 INFO L226 Difference]: Without dead ends: 244 [2020-12-21 22:48:28,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=716, Invalid=7294, Unknown=0, NotChecked=0, Total=8010 [2020-12-21 22:48:28,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-21 22:48:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2020-12-21 22:48:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-21 22:48:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 199 transitions. [2020-12-21 22:48:28,045 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 199 transitions. Word has length 47 [2020-12-21 22:48:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:48:28,046 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 199 transitions. [2020-12-21 22:48:28,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 22:48:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 199 transitions. [2020-12-21 22:48:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:48:28,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:48:28,047 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:48:28,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:48:28,260 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:48:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:48:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -641040110, now seen corresponding path program 3 times [2020-12-21 22:48:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:48:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094485903] [2020-12-21 22:48:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:48:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:48:28,920 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-21 22:48:29,053 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-21 22:48:29,195 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-21 22:48:29,339 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-21 22:48:29,667 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-21 22:48:29,843 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-21 22:48:30,063 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-12-21 22:48:30,271 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-21 22:48:30,463 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-21 22:48:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:31,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094485903] [2020-12-21 22:48:31,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265712545] [2020-12-21 22:48:31,431 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 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 [2020-12-21 22:48:31,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:48:31,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:48:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-21 22:48:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:48:31,766 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:31,766 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:48:31,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:31,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:31,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:31,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2020-12-21 22:48:33,919 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:48:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:33,958 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:33,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 92 [2020-12-21 22:48:33,961 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:34,114 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-21 22:48:34,115 INFO L625 ElimStorePlain]: treesize reduction 63, result has 58.3 percent of original size [2020-12-21 22:48:34,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:48:34,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:88 [2020-12-21 22:48:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:34,714 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:34,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 136 [2020-12-21 22:48:34,719 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:34,913 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-21 22:48:34,914 INFO L625 ElimStorePlain]: treesize reduction 104, result has 48.3 percent of original size [2020-12-21 22:48:34,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:48:34,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:97 [2020-12-21 22:48:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:35,562 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:35,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 145 [2020-12-21 22:48:35,567 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:48:35,756 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-21 22:48:35,757 INFO L625 ElimStorePlain]: treesize reduction 126, result has 51.9 percent of original size [2020-12-21 22:48:35,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-21 22:48:35,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:146, output treesize:136 [2020-12-21 22:48:37,142 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-21 22:48:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:48:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:48:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:48:37,798 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:48:37,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 66 [2020-12-21 22:48:37,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:48:37,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:37,850 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-21 22:48:37,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:37,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2020-12-21 22:48:38,018 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-21 22:48:38,019 INFO L625 ElimStorePlain]: treesize reduction 77, result has 40.3 percent of original size [2020-12-21 22:48:38,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:48:38,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:40 [2020-12-21 22:48:38,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:38,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:48:38,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:48:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:48:38,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:48:38,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2020-12-21 22:48:38,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115410592] [2020-12-21 22:48:38,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 22:48:38,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:48:38,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 22:48:38,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:48:38,770 INFO L87 Difference]: Start difference. First operand 158 states and 199 transitions. Second operand 58 states. [2020-12-21 22:48:39,805 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-12-21 22:48:40,049 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-21 22:48:40,305 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-21 22:48:40,607 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-21 22:48:41,593 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-12-21 22:48:42,115 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-12-21 22:48:42,566 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-21 22:48:42,968 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-12-21 22:48:43,521 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-12-21 22:48:43,992 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-12-21 22:48:44,445 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-12-21 22:48:44,981 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-21 22:48:45,496 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-12-21 22:48:45,886 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-12-21 22:48:48,442 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-12-21 22:48:49,088 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-12-21 22:48:53,748 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2020-12-21 22:48:54,287 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-12-21 22:48:54,906 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2020-12-21 22:48:57,812 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 74 [2020-12-21 22:48:58,417 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-12-21 22:48:59,095 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-12-21 22:49:01,726 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-21 22:49:02,231 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-12-21 22:49:02,679 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-21 22:49:03,200 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2020-12-21 22:49:03,756 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2020-12-21 22:49:04,240 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-12-21 22:49:04,523 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-21 22:49:04,989 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-12-21 22:49:05,260 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-21 22:49:05,775 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2020-12-21 22:49:06,279 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-12-21 22:49:06,858 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-12-21 22:49:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:06,891 INFO L93 Difference]: Finished difference Result 230 states and 282 transitions. [2020-12-21 22:49:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 22:49:06,894 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 47 [2020-12-21 22:49:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:06,896 INFO L225 Difference]: With dead ends: 230 [2020-12-21 22:49:06,896 INFO L226 Difference]: Without dead ends: 206 [2020-12-21 22:49:06,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=871, Invalid=8830, Unknown=1, NotChecked=0, Total=9702 [2020-12-21 22:49:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-21 22:49:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 172. [2020-12-21 22:49:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 22:49:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 219 transitions. [2020-12-21 22:49:06,934 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 219 transitions. Word has length 47 [2020-12-21 22:49:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:06,935 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 219 transitions. [2020-12-21 22:49:06,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 22:49:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 219 transitions. [2020-12-21 22:49:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:49:06,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:06,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:49:07,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:49:07,137 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1703554292, now seen corresponding path program 9 times [2020-12-21 22:49:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:07,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31652540] [2020-12-21 22:49:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:49:07,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31652540] [2020-12-21 22:49:07,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347151704] [2020-12-21 22:49:07,344 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:07,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:49:07,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:49:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 22:49:07,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:07,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-21 22:49:07,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256523369] [2020-12-21 22:49:07,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:49:07,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:49:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:49:07,942 INFO L87 Difference]: Start difference. First operand 172 states and 219 transitions. Second operand 20 states. [2020-12-21 22:49:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:49:09,405 INFO L93 Difference]: Finished difference Result 293 states and 362 transitions. [2020-12-21 22:49:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:49:09,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-12-21 22:49:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:49:09,409 INFO L225 Difference]: With dead ends: 293 [2020-12-21 22:49:09,409 INFO L226 Difference]: Without dead ends: 242 [2020-12-21 22:49:09,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:49:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-21 22:49:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 59. [2020-12-21 22:49:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:49:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-21 22:49:09,438 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 49 [2020-12-21 22:49:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:49:09,438 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-21 22:49:09,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:49:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-21 22:49:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:49:09,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:49:09,439 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:49:09,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:09,653 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:49:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:49:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -939836764, now seen corresponding path program 8 times [2020-12-21 22:49:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:49:09,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890943659] [2020-12-21 22:49:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:49:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:49:10,283 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-21 22:49:10,480 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-21 22:49:10,669 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-21 22:49:10,872 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-21 22:49:11,057 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-21 22:49:11,239 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-21 22:49:11,458 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-21 22:49:11,702 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-12-21 22:49:11,959 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-12-21 22:49:12,214 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-12-21 22:49:12,440 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-21 22:49:12,634 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-21 22:49:12,873 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-21 22:49:13,136 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-12-21 22:49:13,401 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-12-21 22:49:13,663 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-12-21 22:49:13,993 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-12-21 22:49:14,292 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-12-21 22:49:14,642 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-12-21 22:49:14,897 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-21 22:49:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:16,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890943659] [2020-12-21 22:49:16,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120949249] [2020-12-21 22:49:16,364 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:49:16,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:49:16,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:49:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-21 22:49:16,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:49:16,601 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:16,602 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-12-21 22:49:16,606 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:16,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:16,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:49:16,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2020-12-21 22:49:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,049 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:49:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,064 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2020-12-21 22:49:19,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:19,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:19,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:49:19,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:94 [2020-12-21 22:49:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,654 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:49:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:19,664 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2020-12-21 22:49:19,667 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:19,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:19,752 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:49:19,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:126 [2020-12-21 22:49:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,384 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:49:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:20,403 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2020-12-21 22:49:20,407 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:20,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:20,491 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:49:20,492 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:130, output treesize:124 [2020-12-21 22:49:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:49:21,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 96 [2020-12-21 22:49:21,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:21,190 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:21,192 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:49:21,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:141, output treesize:142 [2020-12-21 22:49:23,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 46 [2020-12-21 22:49:23,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:49:23,557 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:49:23,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:49:23,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:150, output treesize:13 [2020-12-21 22:49:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:49:23,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:49:23,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32] total 66 [2020-12-21 22:49:23,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626601418] [2020-12-21 22:49:23,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 22:49:23,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:49:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 22:49:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 22:49:23,927 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 66 states. [2020-12-21 22:49:24,733 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-21 22:49:25,163 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-21 22:49:25,595 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-21 22:49:26,013 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-12-21 22:49:26,358 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-21 22:49:27,062 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-12-21 22:49:27,487 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-12-21 22:49:27,867 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43