/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-crafted/zero_sum_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:25:38,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:25:38,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:25:38,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:25:38,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:25:38,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:25:38,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:25:38,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:25:38,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:25:38,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:25:38,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:25:38,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:25:38,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:25:38,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:25:38,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:25:38,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:25:38,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:25:38,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:25:38,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:25:38,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:25:38,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:25:38,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:25:38,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:25:38,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:25:38,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:25:38,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:25:38,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:25:38,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:25:38,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:25:38,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:25:38,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:25:38,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:25:38,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:25:38,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:25:38,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:25:38,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:25:38,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:25:38,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:25:38,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:25:38,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:25:38,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:25:38,426 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:25:38,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:25:38,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:25:38,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:25:38,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:25:38,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:25:38,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:25:38,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:25:38,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:25:38,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:25:38,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:25:38,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:25:38,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:25:38,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:25:38,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:25:38,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:25:38,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:25:38,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:25:38,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:25:38,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:25:38,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:25:38,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:25:38,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:25:38,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:25:38,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:25:38,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:25:38,839 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:25:38,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2020-12-21 22:25:38,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fb3c80f/6573bb94d50f4e65b1e035512514c8ba/FLAG9b0955cc3 [2020-12-21 22:25:39,532 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:25:39,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2020-12-21 22:25:39,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fb3c80f/6573bb94d50f4e65b1e035512514c8ba/FLAG9b0955cc3 [2020-12-21 22:25:39,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2fb3c80f/6573bb94d50f4e65b1e035512514c8ba [2020-12-21 22:25:39,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:25:39,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:25:39,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:25:39,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:25:39,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:25:39,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:25:39" (1/1) ... [2020-12-21 22:25:39,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e54eed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:39, skipping insertion in model container [2020-12-21 22:25:39,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:25:39" (1/1) ... [2020-12-21 22:25:39,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:25:39,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:25:40,117 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-crafted/zero_sum_m3.c[402,415] [2020-12-21 22:25:40,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:25:40,150 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:25:40,166 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-crafted/zero_sum_m3.c[402,415] [2020-12-21 22:25:40,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:25:40,199 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:25:40,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40 WrapperNode [2020-12-21 22:25:40,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:25:40,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:25:40,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:25:40,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:25:40,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:25:40,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:25:40,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:25:40,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:25:40,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (1/1) ... [2020-12-21 22:25:40,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:25:40,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:25:40,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:25:40,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:25:40,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (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 22:25:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:25:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:25:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:25:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:25:40,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:25:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:25:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:25:40,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:25:40,881 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-21 22:25:40,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:25:40 BoogieIcfgContainer [2020-12-21 22:25:40,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:25:40,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:25:40,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:25:40,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:25:40,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:25:39" (1/3) ... [2020-12-21 22:25:40,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee5ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:25:40, skipping insertion in model container [2020-12-21 22:25:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:40" (2/3) ... [2020-12-21 22:25:40,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee5ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:25:40, skipping insertion in model container [2020-12-21 22:25:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:25:40" (3/3) ... [2020-12-21 22:25:40,897 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2020-12-21 22:25:40,904 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:25:40,910 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:25:40,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:25:40,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:25:40,984 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:25:40,984 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:25:40,985 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:25:40,985 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:25:40,985 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:25:40,985 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:25:40,985 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:25:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-21 22:25:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:25:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:41,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:41,016 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2020-12-21 22:25:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:41,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147448986] [2020-12-21 22:25:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:41,305 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 22:25:41,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147448986] [2020-12-21 22:25:41,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:41,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:25:41,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160188470] [2020-12-21 22:25:41,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:25:41,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:25:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:25:41,344 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-21 22:25:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:41,374 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2020-12-21 22:25:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:25:41,375 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-21 22:25:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:41,402 INFO L225 Difference]: With dead ends: 59 [2020-12-21 22:25:41,403 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:25:41,406 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 22:25:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:25:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-21 22:25:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:25:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 22:25:41,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2020-12-21 22:25:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:41,449 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 22:25:41,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:25:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 22:25:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:25:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:41,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:41,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:25:41,451 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:41,452 INFO L82 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2020-12-21 22:25:41,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:41,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143367304] [2020-12-21 22:25:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:41,549 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 22:25:41,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143367304] [2020-12-21 22:25:41,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:41,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:25:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373863318] [2020-12-21 22:25:41,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:25:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:25:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:25:41,555 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2020-12-21 22:25:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:41,672 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-12-21 22:25:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:25:41,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 22:25:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:41,673 INFO L225 Difference]: With dead ends: 51 [2020-12-21 22:25:41,674 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:25:41,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:25:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:25:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-21 22:25:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:25:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-21 22:25:41,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2020-12-21 22:25:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:41,685 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-21 22:25:41,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:25:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-21 22:25:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:25:41,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:41,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:41,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:25:41,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:41,688 INFO L82 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2020-12-21 22:25:41,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:41,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588861207] [2020-12-21 22:25:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:25:41,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588861207] [2020-12-21 22:25:41,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:41,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:25:41,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983771538] [2020-12-21 22:25:41,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:25:41,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:25:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:25:41,745 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-12-21 22:25:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:41,850 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-12-21 22:25:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:25:41,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-21 22:25:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:41,852 INFO L225 Difference]: With dead ends: 59 [2020-12-21 22:25:41,852 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:25:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:25:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:25:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-21 22:25:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:25:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-21 22:25:41,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2020-12-21 22:25:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:41,862 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-21 22:25:41,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:25:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-21 22:25:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 22:25:41,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:41,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:41,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:25:41,864 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2020-12-21 22:25:41,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:41,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160257094] [2020-12-21 22:25:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 22:25:41,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160257094] [2020-12-21 22:25:41,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445032803] [2020-12-21 22:25:41,965 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 22:25:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:25:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 22:25:42,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:42,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:25:42,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790201786] [2020-12-21 22:25:42,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:25:42,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:25:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:25:42,172 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-12-21 22:25:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:42,241 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-12-21 22:25:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:25:42,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-21 22:25:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:42,243 INFO L225 Difference]: With dead ends: 65 [2020-12-21 22:25:42,243 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:25:42,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:25:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:25:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 22:25:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:25:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-21 22:25:42,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2020-12-21 22:25:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:42,255 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-21 22:25:42,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:25:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-21 22:25:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:25:42,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:42,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:42,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:42,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2020-12-21 22:25:42,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:42,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768883121] [2020-12-21 22:25:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:25:42,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768883121] [2020-12-21 22:25:42,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133400128] [2020-12-21 22:25:42,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:25:42,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:25:42,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:25:42,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:25:42,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:42,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 22:25:42,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239005278] [2020-12-21 22:25:42,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:25:42,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:42,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:25:42,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:25:42,797 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-12-21 22:25:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:42,985 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-12-21 22:25:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:25:42,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 22:25:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:42,988 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:25:42,988 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 22:25:42,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:25:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 22:25:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-21 22:25:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:25:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-21 22:25:42,997 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2020-12-21 22:25:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:42,998 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-21 22:25:42,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:25:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-21 22:25:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:25:43,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:43,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:43,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:43,215 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2020-12-21 22:25:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410032695] [2020-12-21 22:25:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:45,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410032695] [2020-12-21 22:25:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636618016] [2020-12-21 22:25:45,700 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 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 22:25:45,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:25:45,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:45,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-21 22:25:45,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:46,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:46,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:46,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 33 [2020-12-21 22:25:46,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959927892] [2020-12-21 22:25:46,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 22:25:46,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:46,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 22:25:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 22:25:46,982 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 33 states. [2020-12-21 22:25:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:48,313 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-12-21 22:25:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:25:48,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2020-12-21 22:25:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:48,316 INFO L225 Difference]: With dead ends: 89 [2020-12-21 22:25:48,316 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 22:25:48,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 24 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:25:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 22:25:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-12-21 22:25:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 22:25:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-12-21 22:25:48,330 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2020-12-21 22:25:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:48,331 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-12-21 22:25:48,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 22:25:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-12-21 22:25:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:25:48,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:48,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:48,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:48,549 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:48,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2020-12-21 22:25:48,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:48,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973970907] [2020-12-21 22:25:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 22:25:48,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973970907] [2020-12-21 22:25:48,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346853720] [2020-12-21 22:25:48,643 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 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 22:25:48,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:25:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:25:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 22:25:48,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:48,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:25:48,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286753030] [2020-12-21 22:25:48,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:25:48,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:25:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:25:48,823 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 13 states. [2020-12-21 22:25:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:49,140 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2020-12-21 22:25:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:25:49,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-21 22:25:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:49,141 INFO L225 Difference]: With dead ends: 152 [2020-12-21 22:25:49,142 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 22:25:49,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:25:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 22:25:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 22:25:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:25:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-21 22:25:49,154 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2020-12-21 22:25:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:49,155 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-21 22:25:49,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:25:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-21 22:25:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:25:49,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:49,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:49,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:49,370 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2020-12-21 22:25:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:49,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574937863] [2020-12-21 22:25:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:25:49,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574937863] [2020-12-21 22:25:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264417854] [2020-12-21 22:25:49,490 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 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 22:25:49,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:25:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:49,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:25:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:25:49,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:49,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-21 22:25:49,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876278968] [2020-12-21 22:25:49,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:25:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:25:49,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:25:49,753 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 16 states. [2020-12-21 22:25:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:50,191 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-12-21 22:25:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:25:50,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-12-21 22:25:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:50,193 INFO L225 Difference]: With dead ends: 125 [2020-12-21 22:25:50,193 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 22:25:50,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:25:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 22:25:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-12-21 22:25:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 22:25:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-21 22:25:50,202 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2020-12-21 22:25:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:50,203 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-21 22:25:50,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:25:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-21 22:25:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:25:50,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:50,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:50,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:50,419 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:50,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2020-12-21 22:25:50,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:50,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872976057] [2020-12-21 22:25:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:51,858 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-21 22:25:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:55,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872976057] [2020-12-21 22:25:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423827922] [2020-12-21 22:25:55,089 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 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 22:25:55,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:25:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:55,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-21 22:25:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:26:03,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:26:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:26:03,945 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:26:03,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 43 [2020-12-21 22:26:03,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:26:03,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:26:03,962 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-21 22:26:03,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:03,966 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2020-12-21 22:26:04,002 INFO L625 ElimStorePlain]: treesize reduction 6, result has 81.8 percent of original size [2020-12-21 22:26:04,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:04,005 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 22:26:04,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:31 [2020-12-21 22:26:04,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:04,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:26:04,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:26:04,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:26:04,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:04,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 92 [2020-12-21 22:26:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790042059] [2020-12-21 22:26:04,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-21 22:26:04,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-21 22:26:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=7774, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:26:04,676 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 92 states. [2020-12-21 22:26:06,344 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-12-21 22:26:06,730 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-12-21 22:26:07,088 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-12-21 22:26:07,830 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-12-21 22:26:09,177 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-21 22:26:09,512 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-21 22:26:09,866 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-12-21 22:26:10,280 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-12-21 22:26:10,712 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-12-21 22:26:12,947 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-21 22:26:13,320 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-21 22:26:15,901 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-21 22:26:17,556 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-12-21 22:26:19,723 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-21 22:26:20,079 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-21 22:26:21,075 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-21 22:26:22,066 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-21 22:26:22,482 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-21 22:26:23,170 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-12-21 22:26:24,425 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-21 22:26:28,750 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-21 22:26:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:30,441 INFO L93 Difference]: Finished difference Result 235 states and 259 transitions. [2020-12-21 22:26:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-21 22:26:30,442 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 61 [2020-12-21 22:26:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:30,444 INFO L225 Difference]: With dead ends: 235 [2020-12-21 22:26:30,444 INFO L226 Difference]: Without dead ends: 231 [2020-12-21 22:26:30,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1199, Invalid=16093, Unknown=0, NotChecked=0, Total=17292 [2020-12-21 22:26:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-21 22:26:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 109. [2020-12-21 22:26:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:26:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2020-12-21 22:26:30,481 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2020-12-21 22:26:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:30,481 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2020-12-21 22:26:30,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-21 22:26:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2020-12-21 22:26:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:26:30,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:30,484 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:30,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:30,699 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2020-12-21 22:26:30,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:30,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358180984] [2020-12-21 22:26:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 22:26:30,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358180984] [2020-12-21 22:26:30,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510947816] [2020-12-21 22:26:30,874 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 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 22:26:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:26:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 22:26:31,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:31,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:26:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184086454] [2020-12-21 22:26:31,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:26:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:26:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:26:31,151 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 16 states. [2020-12-21 22:26:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:31,756 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2020-12-21 22:26:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:26:31,757 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-12-21 22:26:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:31,758 INFO L225 Difference]: With dead ends: 225 [2020-12-21 22:26:31,758 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 22:26:31,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:26:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 22:26:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-21 22:26:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 22:26:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-12-21 22:26:31,786 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2020-12-21 22:26:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:31,786 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-12-21 22:26:31,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:26:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-12-21 22:26:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 22:26:31,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:31,788 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:31,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:26:31,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2020-12-21 22:26:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:31,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97275233] [2020-12-21 22:26:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 22:26:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97275233] [2020-12-21 22:26:32,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594300234] [2020-12-21 22:26:32,121 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 22:26:32,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:26:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:32,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:26:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 22:26:32,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:32,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:26:32,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785156689] [2020-12-21 22:26:32,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:26:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:26:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:26:32,411 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 16 states. [2020-12-21 22:26:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:33,022 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-12-21 22:26:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:26:33,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-12-21 22:26:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:33,024 INFO L225 Difference]: With dead ends: 155 [2020-12-21 22:26:33,024 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 22:26:33,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:26:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 22:26:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-12-21 22:26:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:26:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-12-21 22:26:33,042 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-12-21 22:26:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:33,042 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-12-21 22:26:33,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:26:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-12-21 22:26:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 22:26:33,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:33,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:33,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:26:33,256 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2020-12-21 22:26:33,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:33,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266537985] [2020-12-21 22:26:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:34,210 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-21 22:26:34,422 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-21 22:26:34,587 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-21 22:26:34,773 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-12-21 22:26:35,814 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-21 22:26:36,046 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-21 22:26:36,246 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-21 22:26:37,536 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-21 22:26:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:26:42,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266537985] [2020-12-21 22:26:42,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874098888] [2020-12-21 22:26:42,755 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 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 22:26:42,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:26:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:42,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2020-12-21 22:26:42,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:43,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:26:43,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:26:43,041 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:26:43,047 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 22:26:43,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-21 22:27:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:27:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:27:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:27:04,765 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:27:04,766 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2020-12-21 22:27:04,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:27:04,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:27:04,772 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-21 22:27:04,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:04,773 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-21 22:27:04,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:27:04,788 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:27:04,810 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:27:04,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:04,815 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 22:27:04,815 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2020-12-21 22:27:05,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:05,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:27:06,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:06,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 56] total 115 [2020-12-21 22:27:06,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188799104] [2020-12-21 22:27:06,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 115 states [2020-12-21 22:27:06,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2020-12-21 22:27:06,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=12652, Unknown=0, NotChecked=0, Total=13110 [2020-12-21 22:27:06,203 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 115 states. [2020-12-21 22:27:12,868 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-12-21 22:27:14,467 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-12-21 22:27:17,628 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-12-21 22:27:18,175 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-21 22:27:19,393 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-12-21 22:27:20,462 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-12-21 22:27:20,966 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-21 22:27:22,405 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2020-12-21 22:27:23,809 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 82 [2020-12-21 22:27:25,398 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 59 [2020-12-21 22:27:26,458 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-12-21 22:27:27,417 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-12-21 22:27:28,813 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2020-12-21 22:27:31,349 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-21 22:27:34,216 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2020-12-21 22:27:35,456 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-12-21 22:27:36,002 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-12-21 22:27:36,969 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-12-21 22:27:38,243 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-21 22:27:42,461 WARN L197 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2020-12-21 22:27:48,872 WARN L197 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2020-12-21 22:27:53,889 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-21 22:27:55,124 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-12-21 22:27:57,135 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-12-21 22:28:00,969 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-21 22:28:03,589 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2020-12-21 22:28:06,342 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 112 DAG size of output: 101 [2020-12-21 22:28:07,526 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-21 22:28:08,772 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-12-21 22:28:09,593 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-12-21 22:28:12,581 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 94 [2020-12-21 22:28:13,558 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-12-21 22:28:17,182 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-21 22:28:22,373 WARN L197 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2020-12-21 22:28:25,284 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-12-21 22:28:26,309 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-21 22:28:27,422 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-12-21 22:28:28,131 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-12-21 22:28:30,084 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-12-21 22:28:32,368 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-12-21 22:28:35,303 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-12-21 22:28:40,074 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-12-21 22:28:42,130 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-12-21 22:28:43,936 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-21 22:28:46,288 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-21 22:28:47,004 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-21 22:28:49,380 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-21 22:28:52,068 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-21 22:28:54,397 WARN L197 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-12-21 22:28:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:55,177 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2020-12-21 22:28:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-12-21 22:28:55,180 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 75 [2020-12-21 22:28:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:55,182 INFO L225 Difference]: With dead ends: 206 [2020-12-21 22:28:55,182 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 22:28:55,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10435 ImplicationChecksByTransitivity, 114.4s TimeCoverageRelationStatistics Valid=1447, Invalid=42861, Unknown=2, NotChecked=0, Total=44310 [2020-12-21 22:28:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 22:28:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 133. [2020-12-21 22:28:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 22:28:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2020-12-21 22:28:55,223 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 75 [2020-12-21 22:28:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:55,223 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2020-12-21 22:28:55,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2020-12-21 22:28:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2020-12-21 22:28:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 22:28:55,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:55,225 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:55,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,441 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2020-12-21 22:28:55,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:55,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262946732] [2020-12-21 22:28:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 22:28:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262946732] [2020-12-21 22:28:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784727819] [2020-12-21 22:28:55,795 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 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 22:28:55,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:55,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:55,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:28:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 22:28:56,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:28:56,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-21 22:28:56,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587475292] [2020-12-21 22:28:56,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:28:56,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:28:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:28:56,555 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand 19 states. [2020-12-21 22:28:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:58,222 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-12-21 22:28:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:28:58,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-12-21 22:28:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:58,228 INFO L225 Difference]: With dead ends: 275 [2020-12-21 22:28:58,229 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:28:58,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:28:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:28:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-21 22:28:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 22:28:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-12-21 22:28:58,251 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 77 [2020-12-21 22:28:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:58,252 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-12-21 22:28:58,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:28:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-12-21 22:28:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:28:58,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:58,253 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:58,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:58,469 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2020-12-21 22:28:58,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:58,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243210536] [2020-12-21 22:28:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-21 22:28:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243210536] [2020-12-21 22:28:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295539530] [2020-12-21 22:28:58,812 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 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 22:28:59,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:28:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:28:59,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-21 22:29:00,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:29:00,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-21 22:29:00,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34493781] [2020-12-21 22:29:00,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:29:00,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:29:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:29:00,026 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 24 states. [2020-12-21 22:29:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:02,045 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2020-12-21 22:29:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:29:02,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-12-21 22:29:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:02,050 INFO L225 Difference]: With dead ends: 185 [2020-12-21 22:29:02,050 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 22:29:02,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:29:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 22:29:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 22:29:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 22:29:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-12-21 22:29:02,064 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-12-21 22:29:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:02,064 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-12-21 22:29:02,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:29:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-12-21 22:29:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:29:02,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:02,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:02,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:29:02,266 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2020-12-21 22:29:02,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:02,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919040022] [2020-12-21 22:29:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:03,449 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-12-21 22:29:03,631 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-12-21 22:29:04,119 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-21 22:29:04,407 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-21 22:29:04,722 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-21 22:29:05,020 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-21 22:29:05,328 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-21 22:29:05,650 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-21 22:29:05,995 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-21 22:29:06,286 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-21 22:29:06,508 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-21 22:29:06,781 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-21 22:29:07,061 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-21 22:29:07,410 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-21 22:29:07,747 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-12-21 22:29:08,117 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-21 22:29:08,489 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-12-21 22:29:08,880 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-21 22:29:09,288 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-12-21 22:29:09,683 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-21 22:29:10,058 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-21 22:29:10,462 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-21 22:29:10,764 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-21 22:29:11,059 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-21 22:29:11,358 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-21 22:29:11,703 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-21 22:29:12,052 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-12-21 22:29:12,411 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-21 22:29:12,780 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-21 22:29:13,187 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-21 22:29:13,590 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-21 22:29:13,887 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-12-21 22:29:14,190 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-21 22:29:14,498 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-12-21 22:29:15,629 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-21 22:29:16,103 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-21 22:29:18,927 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-21 22:29:19,360 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-21 22:29:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:26,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919040022] [2020-12-21 22:29:26,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252711605] [2020-12-21 22:29:26,095 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 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 22:29:26,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 22:29:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:26,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 148 conjunts are in the unsatisfiable core [2020-12-21 22:29:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:26,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:29:26,660 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:26,689 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:26,693 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 22:29:26,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10