/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/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:03:46,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:03:46,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:03:46,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:03:46,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:03:46,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:03:46,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:03:46,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:03:46,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:03:46,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:03:46,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:03:46,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:03:46,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:03:46,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:03:46,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:03:46,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:03:46,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:03:46,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:03:46,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:03:46,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:03:46,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:03:46,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:03:46,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:03:46,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:03:46,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:03:46,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:03:46,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:03:46,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:03:46,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:03:46,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:03:46,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:03:46,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:03:46,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:03:46,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:03:46,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:03:46,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:03:46,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:03:46,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:03:46,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:03:46,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:03:46,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:03:46,476 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:03:46,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:03:46,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:03:46,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:03:46,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:03:46,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:03:46,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:03:46,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:03:46,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:03:46,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:03:46,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:03:46,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:03:46,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:03:46,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:03:46,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:03:46,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:03:46,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:03:46,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:03:46,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:03:46,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:03:46,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:03:46,481 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:03:46,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:03:46,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:03:46,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:03:46,911 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:03:46,912 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:03:46,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-01-06 17:03:46,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d5a5c353/433a1768756a4323a25491e228c29483/FLAG712a6096c [2021-01-06 17:03:47,644 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:03:47,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-01-06 17:03:47,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d5a5c353/433a1768756a4323a25491e228c29483/FLAG712a6096c [2021-01-06 17:03:48,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d5a5c353/433a1768756a4323a25491e228c29483 [2021-01-06 17:03:48,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:03:48,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:03:48,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:48,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:03:48,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:03:48,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0360dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48, skipping insertion in model container [2021-01-06 17:03:48,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:03:48,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:03:48,203 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 17:03:48,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:48,239 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:03:48,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 17:03:48,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:48,276 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:03:48,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48 WrapperNode [2021-01-06 17:03:48,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:48,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:48,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:03:48,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:03:48,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:48,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:03:48,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:03:48,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:03:48,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... [2021-01-06 17:03:48,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:03:48,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:03:48,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:03:48,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:03:48,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:48,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:03:48,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:03:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:03:48,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:03:48,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:03:48,798 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:03:48,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:48 BoogieIcfgContainer [2021-01-06 17:03:48,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:03:48,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:03:48,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:03:48,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:03:48,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:03:48" (1/3) ... [2021-01-06 17:03:48,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8beaea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:48, skipping insertion in model container [2021-01-06 17:03:48,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:48" (2/3) ... [2021-01-06 17:03:48,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8beaea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:48, skipping insertion in model container [2021-01-06 17:03:48,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:48" (3/3) ... [2021-01-06 17:03:48,824 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-01-06 17:03:48,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:03:48,851 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:03:48,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:03:48,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:03:48,963 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:03:48,963 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:03:48,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:03:48,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:03:48,966 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:03:48,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:03:48,966 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:03:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 17:03:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:03:48,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:48,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:03:48,997 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 889681499, now seen corresponding path program 1 times [2021-01-06 17:03:49,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215627486] [2021-01-06 17:03:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215627486] [2021-01-06 17:03:49,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:49,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929903476] [2021-01-06 17:03:49,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,391 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2021-01-06 17:03:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,477 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2021-01-06 17:03:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:49,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 17:03:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,500 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:03:49,500 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:03:49,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:03:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2021-01-06 17:03:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:03:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:03:49,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2021-01-06 17:03:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,550 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:03:49,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:03:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:03:49,551 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:49,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:03:49,553 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1810811368, now seen corresponding path program 1 times [2021-01-06 17:03:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857097865] [2021-01-06 17:03:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857097865] [2021-01-06 17:03:49,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:49,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:49,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329853834] [2021-01-06 17:03:49,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,634 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2021-01-06 17:03:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,662 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-01-06 17:03:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:49,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 17:03:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,664 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:03:49,664 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:03:49,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:03:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-01-06 17:03:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:03:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 17:03:49,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2021-01-06 17:03:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,671 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 17:03:49,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 17:03:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:03:49,672 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:49,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:03:49,673 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash 301781204, now seen corresponding path program 1 times [2021-01-06 17:03:49,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186300131] [2021-01-06 17:03:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186300131] [2021-01-06 17:03:49,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:49,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:49,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279032984] [2021-01-06 17:03:49,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:49,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,726 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2021-01-06 17:03:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,743 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 17:03:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:49,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 17:03:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,745 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:03:49,745 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:03:49,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:03:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 17:03:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:03:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 17:03:49,752 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2021-01-06 17:03:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,752 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 17:03:49,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 17:03:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:03:49,753 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:49,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:03:49,753 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,754 INFO L82 PathProgramCache]: Analyzing trace with hash 766948121, now seen corresponding path program 1 times [2021-01-06 17:03:49,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190987534] [2021-01-06 17:03:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190987534] [2021-01-06 17:03:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450346063] [2021-01-06 17:03:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:03:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:50,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 17:03:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393640039] [2021-01-06 17:03:50,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:03:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:03:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:03:50,005 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2021-01-06 17:03:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,036 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-01-06 17:03:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:03:50,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 17:03:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,037 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:03:50,038 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:03:50,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:03:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:03:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 17:03:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:03:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 17:03:50,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 9 [2021-01-06 17:03:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,044 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 17:03:50,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:03:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 17:03:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:03:50,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:50,259 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1992746636, now seen corresponding path program 2 times [2021-01-06 17:03:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284529151] [2021-01-06 17:03:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284529151] [2021-01-06 17:03:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137470462] [2021-01-06 17:03:50,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:50,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:03:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:50,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 17:03:50,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241364794] [2021-01-06 17:03:50,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:03:50,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:03:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:50,568 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2021-01-06 17:03:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,613 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 17:03:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:03:50,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:03:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,618 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:03:50,618 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:03:50,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:03:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 17:03:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:03:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 17:03:50,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-01-06 17:03:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,625 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 17:03:50,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:03:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 17:03:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:03:50,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,626 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:50,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1643938183, now seen corresponding path program 3 times [2021-01-06 17:03:50,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305312760] [2021-01-06 17:03:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305312760] [2021-01-06 17:03:50,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598346923] [2021-01-06 17:03:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:51,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:03:51,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:03:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:51,206 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:03:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:03:51,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:03:51,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-01-06 17:03:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904420466] [2021-01-06 17:03:51,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:03:51,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:03:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:51,626 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2021-01-06 17:03:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:51,996 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-01-06 17:03:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:03:51,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 17:03:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:51,998 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:03:51,998 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:03:51,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:03:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-01-06 17:03:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:03:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 17:03:52,006 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-01-06 17:03:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,007 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 17:03:52,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:03:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 17:03:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:03:52,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,009 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:52,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:52,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -475837606, now seen corresponding path program 1 times [2021-01-06 17:03:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:52,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130400300] [2021-01-06 17:03:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:52,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130400300] [2021-01-06 17:03:52,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631979159] [2021-01-06 17:03:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:03:52,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:52,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:52,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:03:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195491019] [2021-01-06 17:03:52,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:03:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:03:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:52,546 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2021-01-06 17:03:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:52,822 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-01-06 17:03:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:03:52,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:03:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:52,825 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:52,825 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:03:52,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:03:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:03:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-01-06 17:03:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:03:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 17:03:52,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 15 [2021-01-06 17:03:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,836 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 17:03:52,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:03:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 17:03:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:03:52,837 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,837 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:53,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:53,053 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:53,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1709705080, now seen corresponding path program 2 times [2021-01-06 17:03:53,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:53,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574043159] [2021-01-06 17:03:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:03:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574043159] [2021-01-06 17:03:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414101525] [2021-01-06 17:03:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:53,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:53,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:03:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:03:53,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:53,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-01-06 17:03:53,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339718171] [2021-01-06 17:03:53,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:03:53,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:53,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:03:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:53,491 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2021-01-06 17:03:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:54,042 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-01-06 17:03:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:03:54,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2021-01-06 17:03:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:54,049 INFO L225 Difference]: With dead ends: 83 [2021-01-06 17:03:54,050 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:54,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:03:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-01-06 17:03:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 17:03:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 17:03:54,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 25 [2021-01-06 17:03:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:54,082 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 17:03:54,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:03:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 17:03:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:03:54,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:54,085 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:54,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:54,299 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash 91069662, now seen corresponding path program 3 times [2021-01-06 17:03:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:54,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128752913] [2021-01-06 17:03:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:03:54,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128752913] [2021-01-06 17:03:54,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254717933] [2021-01-06 17:03:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:54,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:03:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:03:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 81 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 17:03:54,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:54,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 17:03:54,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614028689] [2021-01-06 17:03:54,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:03:54,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:03:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:54,755 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2021-01-06 17:03:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:54,815 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2021-01-06 17:03:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:03:54,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2021-01-06 17:03:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:54,817 INFO L225 Difference]: With dead ends: 89 [2021-01-06 17:03:54,817 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:54,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 17:03:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 17:03:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 17:03:54,831 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2021-01-06 17:03:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:54,831 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 17:03:54,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:03:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 17:03:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:03:54,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:54,833 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:55,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:55,042 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash 150465589, now seen corresponding path program 4 times [2021-01-06 17:03:55,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:55,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574790677] [2021-01-06 17:03:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 17:03:55,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574790677] [2021-01-06 17:03:55,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869360237] [2021-01-06 17:03:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:55,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:03:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 17:03:55,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:55,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 17:03:55,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356200354] [2021-01-06 17:03:55,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:03:55,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:55,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:03:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:55,327 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2021-01-06 17:03:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:55,400 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-01-06 17:03:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:03:55,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2021-01-06 17:03:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:55,402 INFO L225 Difference]: With dead ends: 95 [2021-01-06 17:03:55,402 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:03:55,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:03:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-01-06 17:03:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 17:03:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-01-06 17:03:55,417 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2021-01-06 17:03:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:55,417 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-01-06 17:03:55,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:03:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-01-06 17:03:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:03:55,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:55,418 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:55,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:03:55,632 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash 105458046, now seen corresponding path program 5 times [2021-01-06 17:03:55,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:55,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130368542] [2021-01-06 17:03:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 17:03:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130368542] [2021-01-06 17:03:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550712177] [2021-01-06 17:03:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:55,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:03:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:55,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:03:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 202 proven. 28 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-01-06 17:03:56,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:56,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 17:03:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380670049] [2021-01-06 17:03:56,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:03:56,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:03:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:56,062 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 11 states. [2021-01-06 17:03:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:56,142 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-01-06 17:03:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:03:56,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2021-01-06 17:03:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:56,143 INFO L225 Difference]: With dead ends: 101 [2021-01-06 17:03:56,143 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:56,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 17:03:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:03:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-01-06 17:03:56,158 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2021-01-06 17:03:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:56,158 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-01-06 17:03:56,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:03:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-01-06 17:03:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:03:56,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:56,159 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:56,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 17:03:56,363 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 863291797, now seen corresponding path program 6 times [2021-01-06 17:03:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:56,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215967670] [2021-01-06 17:03:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 17:03:56,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215967670] [2021-01-06 17:03:56,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611729460] [2021-01-06 17:03:56,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:56,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 17:03:56,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:03:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 253 proven. 36 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:03:57,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:57,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 17:03:57,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656785246] [2021-01-06 17:03:57,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:03:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:03:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:03:57,058 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2021-01-06 17:03:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:57,149 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-01-06 17:03:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:03:57,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2021-01-06 17:03:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:57,150 INFO L225 Difference]: With dead ends: 107 [2021-01-06 17:03:57,150 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:03:57,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:03:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:03:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 17:03:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:03:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 17:03:57,165 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2021-01-06 17:03:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:57,165 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 17:03:57,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:03:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 17:03:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:03:57,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:57,166 INFO L422 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:57,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,372 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 536100382, now seen corresponding path program 7 times [2021-01-06 17:03:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:57,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928504255] [2021-01-06 17:03:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-01-06 17:03:57,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928504255] [2021-01-06 17:03:57,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759988809] [2021-01-06 17:03:57,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:03:57,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-01-06 17:03:57,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:57,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 17:03:57,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920479155] [2021-01-06 17:03:57,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:03:57,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:03:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:57,712 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 13 states. [2021-01-06 17:03:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:57,815 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-01-06 17:03:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:57,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2021-01-06 17:03:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:57,816 INFO L225 Difference]: With dead ends: 113 [2021-01-06 17:03:57,816 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:03:57,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:03:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 17:03:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:03:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-01-06 17:03:57,831 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2021-01-06 17:03:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:57,832 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-01-06 17:03:57,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:03:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-01-06 17:03:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 17:03:57,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:57,833 INFO L422 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:58,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:58,049 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2070536459, now seen corresponding path program 8 times [2021-01-06 17:03:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:58,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050114639] [2021-01-06 17:03:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 245 proven. 55 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 17:03:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050114639] [2021-01-06 17:03:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234646914] [2021-01-06 17:03:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:58,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:03:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 17:03:58,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:58,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2021-01-06 17:03:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617762205] [2021-01-06 17:03:58,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:03:58,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:03:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:03:58,426 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 17 states. [2021-01-06 17:03:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:59,644 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-01-06 17:03:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 17:03:59,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2021-01-06 17:03:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:59,645 INFO L225 Difference]: With dead ends: 150 [2021-01-06 17:03:59,645 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:03:59,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=3363, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:03:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:03:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-01-06 17:03:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 17:03:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-01-06 17:03:59,664 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 52 [2021-01-06 17:03:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:59,664 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-01-06 17:03:59,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:03:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-01-06 17:03:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 17:03:59,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:59,666 INFO L422 BasicCegarLoop]: trace histogram [44, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:59,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:03:59,893 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:59,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1290530224, now seen corresponding path program 9 times [2021-01-06 17:03:59,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:59,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016966149] [2021-01-06 17:03:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 436 proven. 66 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-01-06 17:04:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016966149] [2021-01-06 17:04:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689114085] [2021-01-06 17:04:00,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 17:04:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 445 proven. 66 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-01-06 17:04:00,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:00,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 17:04:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669463770] [2021-01-06 17:04:00,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:04:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:04:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:04:00,579 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2021-01-06 17:04:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:00,705 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2021-01-06 17:04:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:04:00,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-01-06 17:04:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:00,706 INFO L225 Difference]: With dead ends: 158 [2021-01-06 17:04:00,706 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:04:00,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:04:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:04:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 17:04:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 17:04:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-01-06 17:04:00,723 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 71 [2021-01-06 17:04:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:00,723 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-01-06 17:04:00,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:04:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-01-06 17:04:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 17:04:00,724 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:00,724 INFO L422 BasicCegarLoop]: trace histogram [48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:00,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:04:00,928 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1455118632, now seen corresponding path program 10 times [2021-01-06 17:04:00,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:00,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416528919] [2021-01-06 17:04:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2021-01-06 17:04:01,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416528919] [2021-01-06 17:04:01,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675158462] [2021-01-06 17:04:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:01,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:04:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-01-06 17:04:01,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:01,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-01-06 17:04:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15694792] [2021-01-06 17:04:01,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:04:01,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:04:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:04:01,570 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 25 states. [2021-01-06 17:04:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:03,683 INFO L93 Difference]: Finished difference Result 201 states and 220 transitions. [2021-01-06 17:04:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 17:04:03,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2021-01-06 17:04:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:03,685 INFO L225 Difference]: With dead ends: 201 [2021-01-06 17:04:03,685 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 17:04:03,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=6711, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 17:04:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 17:04:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2021-01-06 17:04:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 17:04:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-01-06 17:04:03,709 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 75 [2021-01-06 17:04:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:03,709 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-01-06 17:04:03,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:04:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-01-06 17:04:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 17:04:03,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:03,711 INFO L422 BasicCegarLoop]: trace histogram [65, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:03,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:04:03,924 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash 183931010, now seen corresponding path program 11 times [2021-01-06 17:04:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:03,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869956630] [2021-01-06 17:04:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 789 proven. 91 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-01-06 17:04:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869956630] [2021-01-06 17:04:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775729943] [2021-01-06 17:04:04,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:06,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:04:06,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:04:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1392 proven. 91 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-01-06 17:04:06,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:06,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 17:04:06,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362363428] [2021-01-06 17:04:06,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:04:06,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:04:06,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:04:06,568 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 17 states. [2021-01-06 17:04:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:06,768 INFO L93 Difference]: Finished difference Result 211 states and 228 transitions. [2021-01-06 17:04:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:04:06,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2021-01-06 17:04:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:06,770 INFO L225 Difference]: With dead ends: 211 [2021-01-06 17:04:06,771 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 17:04:06,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:04:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 17:04:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-01-06 17:04:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 17:04:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-01-06 17:04:06,794 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 97 [2021-01-06 17:04:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:06,797 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-01-06 17:04:06,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:04:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-01-06 17:04:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 17:04:06,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:06,799 INFO L422 BasicCegarLoop]: trace histogram [70, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:07,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:07,003 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1472491819, now seen corresponding path program 12 times [2021-01-06 17:04:07,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:07,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379578607] [2021-01-06 17:04:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2820 backedges. 905 proven. 105 refuted. 0 times theorem prover too weak. 1810 trivial. 0 not checked. [2021-01-06 17:04:07,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379578607] [2021-01-06 17:04:07,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001067647] [2021-01-06 17:04:07,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:15,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 17:04:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:04:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2820 backedges. 1595 proven. 105 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-01-06 17:04:15,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:15,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 17:04:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817922738] [2021-01-06 17:04:15,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:04:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:04:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:04:15,831 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 18 states. [2021-01-06 17:04:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:16,022 INFO L93 Difference]: Finished difference Result 221 states and 238 transitions. [2021-01-06 17:04:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:04:16,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2021-01-06 17:04:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:16,024 INFO L225 Difference]: With dead ends: 221 [2021-01-06 17:04:16,024 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 17:04:16,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:04:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 17:04:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-01-06 17:04:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 17:04:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-01-06 17:04:16,046 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 102 [2021-01-06 17:04:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:16,047 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-01-06 17:04:16,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:04:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-01-06 17:04:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 17:04:16,048 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:16,048 INFO L422 BasicCegarLoop]: trace histogram [75, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:16,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:04:16,253 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2114425758, now seen corresponding path program 13 times [2021-01-06 17:04:16,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:16,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717025129] [2021-01-06 17:04:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1029 proven. 120 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2021-01-06 17:04:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717025129] [2021-01-06 17:04:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280326629] [2021-01-06 17:04:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:16,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:04:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1029 proven. 120 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2021-01-06 17:04:16,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:16,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 17:04:16,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073491689] [2021-01-06 17:04:16,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:04:16,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:04:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:16,819 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 19 states. [2021-01-06 17:04:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:17,047 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2021-01-06 17:04:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:04:17,048 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2021-01-06 17:04:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:17,049 INFO L225 Difference]: With dead ends: 231 [2021-01-06 17:04:17,049 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 17:04:17,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 17:04:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 17:04:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 17:04:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2021-01-06 17:04:17,071 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 107 [2021-01-06 17:04:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:17,072 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2021-01-06 17:04:17,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:04:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2021-01-06 17:04:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 17:04:17,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:17,073 INFO L422 BasicCegarLoop]: trace histogram [80, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:17,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:17,289 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -988403467, now seen corresponding path program 14 times [2021-01-06 17:04:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194330768] [2021-01-06 17:04:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 1161 proven. 136 refuted. 0 times theorem prover too weak. 2318 trivial. 0 not checked. [2021-01-06 17:04:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194330768] [2021-01-06 17:04:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793217704] [2021-01-06 17:04:17,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:17,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:04:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 0 proven. 2935 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-01-06 17:04:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2021-01-06 17:04:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254027731] [2021-01-06 17:04:18,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:04:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:04:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:04:18,059 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 25 states. [2021-01-06 17:04:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:22,100 INFO L93 Difference]: Finished difference Result 284 states and 306 transitions. [2021-01-06 17:04:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-01-06 17:04:22,101 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2021-01-06 17:04:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:22,103 INFO L225 Difference]: With dead ends: 284 [2021-01-06 17:04:22,103 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 17:04:22,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5157 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=663, Invalid=15339, Unknown=0, NotChecked=0, Total=16002 [2021-01-06 17:04:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 17:04:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2021-01-06 17:04:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 17:04:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2021-01-06 17:04:22,137 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 112 [2021-01-06 17:04:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:22,138 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2021-01-06 17:04:22,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:04:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2021-01-06 17:04:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 17:04:22,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:22,139 INFO L422 BasicCegarLoop]: trace histogram [102, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:22,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:22,355 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1207340588, now seen corresponding path program 15 times [2021-01-06 17:04:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:22,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073430636] [2021-01-06 17:04:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5844 backedges. 1626 proven. 153 refuted. 0 times theorem prover too weak. 4065 trivial. 0 not checked. [2021-01-06 17:04:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073430636] [2021-01-06 17:04:22,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677687568] [2021-01-06 17:04:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:24,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-01-06 17:04:24,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:24,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:04:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5844 backedges. 1641 proven. 153 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2021-01-06 17:04:25,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:25,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 17:04:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333079884] [2021-01-06 17:04:25,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:25,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:25,137 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand 21 states. [2021-01-06 17:04:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:25,388 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2021-01-06 17:04:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:04:25,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2021-01-06 17:04:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:25,390 INFO L225 Difference]: With dead ends: 296 [2021-01-06 17:04:25,391 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 17:04:25,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 17:04:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 17:04:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 17:04:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2021-01-06 17:04:25,416 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 139 [2021-01-06 17:04:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:25,416 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2021-01-06 17:04:25,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2021-01-06 17:04:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 17:04:25,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:25,418 INFO L422 BasicCegarLoop]: trace histogram [108, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:25,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:04:25,624 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1142702600, now seen corresponding path program 16 times [2021-01-06 17:04:25,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:25,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938045024] [2021-01-06 17:04:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6507 backedges. 1811 proven. 171 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2021-01-06 17:04:26,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938045024] [2021-01-06 17:04:26,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225871598] [2021-01-06 17:04:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:26,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:04:26,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6507 backedges. 1811 proven. 171 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2021-01-06 17:04:26,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:26,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 17:04:26,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860062137] [2021-01-06 17:04:26,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:26,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:26,376 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand 22 states. [2021-01-06 17:04:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:26,672 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2021-01-06 17:04:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:04:26,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2021-01-06 17:04:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:26,675 INFO L225 Difference]: With dead ends: 308 [2021-01-06 17:04:26,675 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 17:04:26,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 17:04:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-01-06 17:04:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 17:04:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2021-01-06 17:04:26,704 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 145 [2021-01-06 17:04:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:26,705 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2021-01-06 17:04:26,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2021-01-06 17:04:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 17:04:26,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:26,706 INFO L422 BasicCegarLoop]: trace histogram [114, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:26,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:26,907 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash -329577836, now seen corresponding path program 17 times [2021-01-06 17:04:26,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:26,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59293697] [2021-01-06 17:04:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2021-01-06 17:04:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59293697] [2021-01-06 17:04:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820506417] [2021-01-06 17:04:27,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:57,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 17:04:57,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 17:04:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 3625 proven. 190 refuted. 0 times theorem prover too weak. 3391 trivial. 0 not checked. [2021-01-06 17:04:57,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:57,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:04:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077355418] [2021-01-06 17:04:57,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:04:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:57,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:04:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:57,778 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 23 states. [2021-01-06 17:04:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:58,124 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2021-01-06 17:04:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:04:58,124 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 151 [2021-01-06 17:04:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:58,125 INFO L225 Difference]: With dead ends: 320 [2021-01-06 17:04:58,125 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 17:04:58,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 17:04:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-01-06 17:04:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 17:04:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 171 transitions. [2021-01-06 17:04:58,153 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 171 transitions. Word has length 151 [2021-01-06 17:04:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:58,153 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 171 transitions. [2021-01-06 17:04:58,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:04:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 171 transitions. [2021-01-06 17:04:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 17:04:58,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:58,155 INFO L422 BasicCegarLoop]: trace histogram [120, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:04:58,361 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1740729288, now seen corresponding path program 18 times [2021-01-06 17:04:58,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:58,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664379836] [2021-01-06 17:04:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7941 backedges. 2211 proven. 210 refuted. 0 times theorem prover too weak. 5520 trivial. 0 not checked. [2021-01-06 17:04:58,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664379836] [2021-01-06 17:04:58,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308774072] [2021-01-06 17:04:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:53,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 17:05:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:53,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 190 conjunts are in the unsatisfiable core [2021-01-06 17:05:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7941 backedges. 3994 proven. 210 refuted. 0 times theorem prover too weak. 3737 trivial. 0 not checked. [2021-01-06 17:05:53,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:53,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:05:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25906738] [2021-01-06 17:05:53,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:05:53,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:05:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:05:53,726 INFO L87 Difference]: Start difference. First operand 164 states and 171 transitions. Second operand 24 states. [2021-01-06 17:05:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:54,115 INFO L93 Difference]: Finished difference Result 332 states and 352 transitions. [2021-01-06 17:05:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:05:54,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2021-01-06 17:05:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:54,117 INFO L225 Difference]: With dead ends: 332 [2021-01-06 17:05:54,117 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 17:05:54,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 139 SyntacticMatches, 19 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:05:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 17:05:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-01-06 17:05:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 17:05:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2021-01-06 17:05:54,149 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 157 [2021-01-06 17:05:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:54,150 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2021-01-06 17:05:54,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:05:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2021-01-06 17:05:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-01-06 17:05:54,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:54,152 INFO L422 BasicCegarLoop]: trace histogram [126, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:54,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:05:54,360 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 529015636, now seen corresponding path program 19 times [2021-01-06 17:05:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:54,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238399641] [2021-01-06 17:05:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 2426 proven. 231 refuted. 0 times theorem prover too weak. 6055 trivial. 0 not checked. [2021-01-06 17:05:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238399641] [2021-01-06 17:05:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084115543] [2021-01-06 17:05:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:05:55,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 2426 proven. 231 refuted. 0 times theorem prover too weak. 6055 trivial. 0 not checked. [2021-01-06 17:05:55,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:55,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:05:55,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988584338] [2021-01-06 17:05:55,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:05:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:05:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:05:55,277 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 25 states. [2021-01-06 17:05:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:55,691 INFO L93 Difference]: Finished difference Result 344 states and 364 transitions. [2021-01-06 17:05:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:05:55,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 163 [2021-01-06 17:05:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:55,692 INFO L225 Difference]: With dead ends: 344 [2021-01-06 17:05:55,692 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:05:55,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:05:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:05:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-01-06 17:05:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 17:05:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2021-01-06 17:05:55,725 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 163 [2021-01-06 17:05:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:55,725 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2021-01-06 17:05:55,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:05:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2021-01-06 17:05:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 17:05:55,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:55,727 INFO L422 BasicCegarLoop]: trace histogram [132, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:55,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:55,942 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1083397512, now seen corresponding path program 20 times [2021-01-06 17:05:55,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:55,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736541695] [2021-01-06 17:05:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9519 backedges. 2651 proven. 253 refuted. 0 times theorem prover too weak. 6615 trivial. 0 not checked. [2021-01-06 17:05:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736541695] [2021-01-06 17:05:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751329288] [2021-01-06 17:05:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:56,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:05:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9519 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-01-06 17:05:57,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:57,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 17:05:57,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253769737] [2021-01-06 17:05:57,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:05:57,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:05:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:05:57,135 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand 32 states. [2021-01-06 17:06:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:05,694 INFO L93 Difference]: Finished difference Result 411 states and 436 transitions. [2021-01-06 17:06:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-01-06 17:06:05,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2021-01-06 17:06:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:05,696 INFO L225 Difference]: With dead ends: 411 [2021-01-06 17:06:05,696 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 17:06:05,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12887 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1035, Invalid=36021, Unknown=0, NotChecked=0, Total=37056 [2021-01-06 17:06:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 17:06:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 210. [2021-01-06 17:06:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-01-06 17:06:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 218 transitions. [2021-01-06 17:06:05,756 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 218 transitions. Word has length 169 [2021-01-06 17:06:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:05,756 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 218 transitions. [2021-01-06 17:06:05,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:06:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 218 transitions. [2021-01-06 17:06:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-01-06 17:06:05,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:05,758 INFO L422 BasicCegarLoop]: trace histogram [161, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:05,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:06:05,973 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1670819142, now seen corresponding path program 21 times [2021-01-06 17:06:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:05,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841387143] [2021-01-06 17:06:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 3463 proven. 276 refuted. 0 times theorem prover too weak. 10380 trivial. 0 not checked. [2021-01-06 17:06:06,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841387143] [2021-01-06 17:06:06,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691316171] [2021-01-06 17:06:06,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:10,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 17:06:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:06:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 3481 proven. 276 refuted. 0 times theorem prover too weak. 10362 trivial. 0 not checked. [2021-01-06 17:06:10,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:10,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:06:10,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925292071] [2021-01-06 17:06:10,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:06:10,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:06:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:06:10,833 INFO L87 Difference]: Start difference. First operand 210 states and 218 transitions. Second operand 27 states. [2021-01-06 17:06:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:11,377 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2021-01-06 17:06:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:06:11,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 203 [2021-01-06 17:06:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:11,379 INFO L225 Difference]: With dead ends: 425 [2021-01-06 17:06:11,379 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 17:06:11,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 192 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:06:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 17:06:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-01-06 17:06:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 17:06:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2021-01-06 17:06:11,424 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 203 [2021-01-06 17:06:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:11,424 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2021-01-06 17:06:11,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:06:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2021-01-06 17:06:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-01-06 17:06:11,428 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:11,429 INFO L422 BasicCegarLoop]: trace histogram [168, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:11,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:11,634 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1461556821, now seen corresponding path program 22 times [2021-01-06 17:06:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:11,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864589016] [2021-01-06 17:06:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15316 backedges. 3757 proven. 300 refuted. 0 times theorem prover too weak. 11259 trivial. 0 not checked. [2021-01-06 17:06:12,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864589016] [2021-01-06 17:06:12,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660049591] [2021-01-06 17:06:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:12,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:06:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:06:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15316 backedges. 3757 proven. 300 refuted. 0 times theorem prover too weak. 11259 trivial. 0 not checked. [2021-01-06 17:06:12,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:12,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 17:06:12,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483406936] [2021-01-06 17:06:12,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:06:12,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:06:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:06:12,795 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 28 states. [2021-01-06 17:06:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:13,307 INFO L93 Difference]: Finished difference Result 439 states and 462 transitions. [2021-01-06 17:06:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:06:13,307 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 210 [2021-01-06 17:06:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:13,309 INFO L225 Difference]: With dead ends: 439 [2021-01-06 17:06:13,309 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 17:06:13,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:06:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 17:06:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2021-01-06 17:06:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 17:06:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2021-01-06 17:06:13,352 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 210 [2021-01-06 17:06:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:13,352 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2021-01-06 17:06:13,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:06:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2021-01-06 17:06:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-01-06 17:06:13,354 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:13,354 INFO L422 BasicCegarLoop]: trace histogram [175, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:13,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:06:13,569 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1190981222, now seen corresponding path program 23 times [2021-01-06 17:06:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:13,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309209349] [2021-01-06 17:06:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16562 backedges. 4063 proven. 325 refuted. 0 times theorem prover too weak. 12174 trivial. 0 not checked. [2021-01-06 17:06:14,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309209349] [2021-01-06 17:06:14,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784908361] [2021-01-06 17:06:14,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:59,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-01-06 17:07:59,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 17:07:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16562 backedges. 7466 proven. 325 refuted. 0 times theorem prover too weak. 8771 trivial. 0 not checked. [2021-01-06 17:08:00,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:00,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 17:08:00,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616942611] [2021-01-06 17:08:00,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:08:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:08:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:08:00,858 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 29 states. [2021-01-06 17:08:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:01,477 INFO L93 Difference]: Finished difference Result 453 states and 476 transitions. [2021-01-06 17:08:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:08:01,478 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 217 [2021-01-06 17:08:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:01,479 INFO L225 Difference]: With dead ends: 453 [2021-01-06 17:08:01,479 INFO L226 Difference]: Without dead ends: 232 [2021-01-06 17:08:01,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 198 SyntacticMatches, 20 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:08:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-01-06 17:08:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-01-06 17:08:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-01-06 17:08:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2021-01-06 17:08:01,523 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 239 transitions. Word has length 217 [2021-01-06 17:08:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:01,523 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-01-06 17:08:01,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:08:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 239 transitions. [2021-01-06 17:08:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-01-06 17:08:01,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:01,525 INFO L422 BasicCegarLoop]: trace histogram [182, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:08:01,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:08:01,726 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 354739509, now seen corresponding path program 24 times [2021-01-06 17:08:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:01,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040517527] [2021-01-06 17:08:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17857 backedges. 4381 proven. 351 refuted. 0 times theorem prover too weak. 13125 trivial. 0 not checked. [2021-01-06 17:08:02,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040517527] [2021-01-06 17:08:02,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781002700] [2021-01-06 17:08:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true