/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_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:27:36,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:27:36,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:27:36,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:27:36,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:27:36,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:27:36,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:27:36,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:27:36,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:27:36,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:27:36,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:27:36,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:27:36,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:27:36,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:27:36,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:27:36,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:27:36,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:27:36,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:27:36,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:27:36,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:27:36,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:27:36,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:27:36,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:27:36,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:27:36,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:27:36,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:27:36,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:27:36,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:27:36,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:27:36,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:27:36,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:27:36,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:27:36,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:27:36,665 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:27:36,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:27:36,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:27:36,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:27:36,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:27:36,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:27:36,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:27:36,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:27:36,667 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:27:36,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:27:36,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:27:36,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:27:36,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:27:36,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:27:36,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:27:36,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:27:36,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:27:36,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:27:36,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:27:36,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:27:36,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:27:36,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:27:37,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:27:37,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:27:37,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:27:37,248 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:27:37,250 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:27:37,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2020-12-21 22:27:37,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61afa7017/18854cf931854f57b4892c26fa82bf7d/FLAG35ad7f3ea [2020-12-21 22:27:38,184 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:27:38,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2020-12-21 22:27:38,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61afa7017/18854cf931854f57b4892c26fa82bf7d/FLAG35ad7f3ea [2020-12-21 22:27:38,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61afa7017/18854cf931854f57b4892c26fa82bf7d [2020-12-21 22:27:38,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:27:38,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:27:38,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:38,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:27:38,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:27:38,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:38" (1/1) ... [2020-12-21 22:27:38,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee23663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:38, skipping insertion in model container [2020-12-21 22:27:38,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:38" (1/1) ... [2020-12-21 22:27:38,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:27:38,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:27:38,867 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_m5.c[402,415] [2020-12-21 22:27:38,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:38,943 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:27:38,970 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_m5.c[402,415] [2020-12-21 22:27:39,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:39,071 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:27:39,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39 WrapperNode [2020-12-21 22:27:39,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:39,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:39,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:27:39,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:27:39,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:39,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:27:39,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:27:39,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:27:39,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (1/1) ... [2020-12-21 22:27:39,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:27:39,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:27:39,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:27:39,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:27:39,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (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 22:27:39,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:27:39,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:27:39,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:27:39,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:27:39,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:27:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:27:39,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:27:40,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:27:40,356 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 22:27:40,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:40 BoogieIcfgContainer [2020-12-21 22:27:40,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:27:40,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:27:40,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:27:40,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:27:40,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:27:38" (1/3) ... [2020-12-21 22:27:40,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c92657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:40, skipping insertion in model container [2020-12-21 22:27:40,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:39" (2/3) ... [2020-12-21 22:27:40,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c92657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:40, skipping insertion in model container [2020-12-21 22:27:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:40" (3/3) ... [2020-12-21 22:27:40,380 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2020-12-21 22:27:40,392 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:27:40,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:27:40,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:27:40,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:27:40,503 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:27:40,503 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:27:40,503 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:27:40,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:27:40,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:27:40,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:27:40,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:27:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-21 22:27:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:27:40,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:40,549 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] [2020-12-21 22:27:40,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2020-12-21 22:27:40,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:40,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303190213] [2020-12-21 22:27:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:40,825 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 22:27:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303190213] [2020-12-21 22:27:40,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:40,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:27:40,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743796435] [2020-12-21 22:27:40,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:27:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:27:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:27:40,862 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2020-12-21 22:27:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:40,901 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2020-12-21 22:27:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:27:40,903 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-12-21 22:27:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:40,918 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:27:40,918 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:27:40,923 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 22:27:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:27:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-21 22:27:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:27:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 22:27:40,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2020-12-21 22:27:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:40,982 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 22:27:40,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:27:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 22:27:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:27:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:40,985 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] [2020-12-21 22:27:40,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:27:40,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:40,986 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2020-12-21 22:27:40,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:40,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001250670] [2020-12-21 22:27:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:41,080 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 22:27:41,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001250670] [2020-12-21 22:27:41,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:41,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:27:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380694300] [2020-12-21 22:27:41,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:27:41,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:27:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:27:41,087 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 22:27:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:41,197 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-12-21 22:27:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:27:41,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 22:27:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:41,200 INFO L225 Difference]: With dead ends: 75 [2020-12-21 22:27:41,200 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:27:41,202 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 22:27:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:27:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 22:27:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:27:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-21 22:27:41,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-12-21 22:27:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:41,215 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-21 22:27:41,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:27:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-21 22:27:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:27:41,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:41,216 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] [2020-12-21 22:27:41,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:27:41,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2020-12-21 22:27:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:41,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589568121] [2020-12-21 22:27:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:41,307 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 22:27:41,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589568121] [2020-12-21 22:27:41,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:41,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182996213] [2020-12-21 22:27:41,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:41,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:41,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:41,312 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2020-12-21 22:27:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:41,739 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-12-21 22:27:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:41,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-21 22:27:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:41,742 INFO L225 Difference]: With dead ends: 91 [2020-12-21 22:27:41,742 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 22:27:41,744 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 22:27:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 22:27:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-12-21 22:27:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:27:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-21 22:27:41,757 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2020-12-21 22:27:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-21 22:27:41,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-21 22:27:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:27:41,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:41,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:41,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:27:41,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2020-12-21 22:27:41,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:41,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837365231] [2020-12-21 22:27:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:27:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837365231] [2020-12-21 22:27:41,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004091773] [2020-12-21 22:27:41,911 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 22:27:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:27:42,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:42,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:27:42,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378955423] [2020-12-21 22:27:42,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:27:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:27:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:27:42,262 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-12-21 22:27:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:42,444 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-12-21 22:27:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:27:42,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-21 22:27:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:42,446 INFO L225 Difference]: With dead ends: 97 [2020-12-21 22:27:42,446 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 22:27:42,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 22:27:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 22:27:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 22:27:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:27:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-21 22:27:42,459 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2020-12-21 22:27:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:42,459 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-21 22:27:42,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:27:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-21 22:27:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:27:42,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:42,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:42,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:42,676 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2020-12-21 22:27:42,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:42,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597336977] [2020-12-21 22:27:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:27:42,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597336977] [2020-12-21 22:27:42,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475451567] [2020-12-21 22:27:42,800 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 22:27:42,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:27:42,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:27:43,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:43,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 22:27:43,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638777143] [2020-12-21 22:27:43,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:27:43,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:27:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:27:43,128 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-12-21 22:27:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:43,476 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2020-12-21 22:27:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:27:43,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-21 22:27:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:43,479 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:27:43,479 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 22:27:43,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 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 22:27:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 22:27:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-12-21 22:27:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 22:27:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-12-21 22:27:43,493 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2020-12-21 22:27:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:43,494 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-12-21 22:27:43,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:27:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-12-21 22:27:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:27:43,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:43,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:43,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:43,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2020-12-21 22:27:43,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:43,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779520593] [2020-12-21 22:27:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:49,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779520593] [2020-12-21 22:27:49,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391980656] [2020-12-21 22:27:49,714 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 22:27:49,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:27:49,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:49,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 104 conjunts are in the unsatisfiable core [2020-12-21 22:27:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:08,632 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:28:08,634 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2020-12-21 22:28:08,641 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:28:08,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:28:08,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:08,672 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 22:28:08,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2020-12-21 22:28:09,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:09,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:09,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:09,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:09,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:28:09,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 57] total 97 [2020-12-21 22:28:09,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488876669] [2020-12-21 22:28:09,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-21 22:28:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-21 22:28:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=8981, Unknown=0, NotChecked=0, Total=9312 [2020-12-21 22:28:09,758 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 97 states. [2020-12-21 22:28:20,537 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-21 22:28:31,263 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-12-21 22:28:38,375 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-21 22:28:51,963 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-12-21 22:29:08,127 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-12-21 22:29:13,186 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-12-21 22:30:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:30:04,222 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2020-12-21 22:30:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-21 22:30:04,223 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 71 [2020-12-21 22:30:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:30:04,225 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:30:04,225 INFO L226 Difference]: Without dead ends: 201 [2020-12-21 22:30:04,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3732 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=526, Invalid=14720, Unknown=6, NotChecked=0, Total=15252 [2020-12-21 22:30:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-21 22:30:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2020-12-21 22:30:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:30:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2020-12-21 22:30:04,253 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2020-12-21 22:30:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:30:04,253 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2020-12-21 22:30:04,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-21 22:30:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2020-12-21 22:30:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 22:30:04,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:30:04,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:30:04,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:30:04,457 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:30:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:30:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2020-12-21 22:30:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:30:04,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631156113] [2020-12-21 22:30:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:30:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:30:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:30:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631156113] [2020-12-21 22:30:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001009574] [2020-12-21 22:30:04,658 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 22:30:04,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:30:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:30:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:30:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:30:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:30:05,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:30:05,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:30:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182316741] [2020-12-21 22:30:05,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:30:05,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:30:05,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:30:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:30:05,010 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2020-12-21 22:30:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:30:06,030 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2020-12-21 22:30:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:30:06,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2020-12-21 22:30:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:30:06,032 INFO L225 Difference]: With dead ends: 248 [2020-12-21 22:30:06,032 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 22:30:06,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:30:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 22:30:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 22:30:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 22:30:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2020-12-21 22:30:06,064 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2020-12-21 22:30:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:30:06,064 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2020-12-21 22:30:06,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:30:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2020-12-21 22:30:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 22:30:06,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:30:06,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:30:06,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:30:06,269 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:30:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:30:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2020-12-21 22:30:06,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:30:06,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107963951] [2020-12-21 22:30:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:30:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:30:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:30:06,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107963951] [2020-12-21 22:30:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601052338] [2020-12-21 22:30:06,450 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 22:30:06,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:30:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:30:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:30:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:30:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:30:06,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:30:06,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:30:06,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088517262] [2020-12-21 22:30:06,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:30:06,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:30:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:30:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:30:06,866 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand 13 states. [2020-12-21 22:30:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:30:07,766 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2020-12-21 22:30:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:30:07,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-12-21 22:30:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:30:07,769 INFO L225 Difference]: With dead ends: 209 [2020-12-21 22:30:07,770 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:30:07,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:30:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:30:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-12-21 22:30:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 22:30:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-12-21 22:30:07,780 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2020-12-21 22:30:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:30:07,781 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-12-21 22:30:07,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:30:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-12-21 22:30:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 22:30:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:30:07,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:30:07,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:30:07,995 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:30:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:30:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2020-12-21 22:30:07,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:30:07,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171555065] [2020-12-21 22:30:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:30:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:30:09,493 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-21 22:30:09,719 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-21 22:30:09,900 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-21 22:30:10,535 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-21 22:30:10,779 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-21 22:30:10,979 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-21 22:30:11,706 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-21 22:30:12,044 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-21 22:30:12,296 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-21 22:30:13,179 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-21 22:30:13,457 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-21 22:30:13,718 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-21 22:30:13,980 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-21 22:30:14,248 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-21 22:30:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:30:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171555065] [2020-12-21 22:30:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102979518] [2020-12-21 22:30:25,337 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 22:30:25,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:30:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:30:25,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 140 conjunts are in the unsatisfiable core [2020-12-21 22:30:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:30:57,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:30:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:30:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:30:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:30:57,151 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:30:57,152 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 86 [2020-12-21 22:30:57,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:30:57,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:30:57,168 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-21 22:30:57,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:30:57,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:30:57,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:30:57,174 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-21 22:30:57,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:30:57,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:30:57,180 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-21 22:30:57,184 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-21 22:30:57,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:30:57,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-12-21 22:30:57,339 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2020-12-21 22:30:57,341 INFO L625 ElimStorePlain]: treesize reduction 40, result has 42.0 percent of original size [2020-12-21 22:30:57,343 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 22:30:57,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:97, output treesize:24 [2020-12-21 22:30:57,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:30:58,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:30:58,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:30:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:30:59,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:30:59,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 69] total 130 [2020-12-21 22:30:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462056690] [2020-12-21 22:30:59,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-12-21 22:30:59,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:30:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-12-21 22:30:59,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=880, Invalid=15890, Unknown=0, NotChecked=0, Total=16770 [2020-12-21 22:30:59,225 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 130 states. [2020-12-21 22:31:03,831 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-21 22:31:04,566 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-12-21 22:31:05,673 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 70 [2020-12-21 22:31:06,822 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-12-21 22:31:08,099 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2020-12-21 22:31:10,558 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 68 [2020-12-21 22:31:12,722 WARN L197 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 87 [2020-12-21 22:31:14,425 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-21 22:31:15,663 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-12-21 22:31:16,742 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-12-21 22:31:18,018 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-12-21 22:31:19,567 WARN L197 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-12-21 22:31:20,522 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-12-21 22:31:21,634 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-12-21 22:31:22,574 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-12-21 22:31:24,663 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 65 [2020-12-21 22:31:28,749 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2020-12-21 22:31:30,370 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-12-21 22:31:32,159 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 80 [2020-12-21 22:31:38,858 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 82 [2020-12-21 22:31:40,467 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2020-12-21 22:31:46,210 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-12-21 22:31:47,752 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-21 22:31:49,430 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2020-12-21 22:31:51,253 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 89