/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:18:46,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:18:46,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:18:46,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:18:46,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:18:46,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:18:46,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:18:46,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:18:46,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:18:46,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:18:46,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:18:46,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:18:46,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:18:46,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:18:46,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:18:46,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:18:46,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:18:46,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:18:46,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:18:46,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:18:46,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:18:46,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:18:46,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:18:46,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:18:46,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:18:46,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:18:46,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:18:46,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:18:46,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:18:46,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:18:46,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:18:46,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:18:46,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:18:46,634 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:18:46,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:18:46,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:18:46,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:18:46,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:18:46,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:18:46,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:18:46,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:18:46,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:18:46,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:18:46,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:18:46,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:18:46,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:18:46,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:18:46,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:18:46,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:18:46,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:18:46,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:18:46,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:18:46,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:18:46,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:18:46,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:18:46,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:18:46,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:18:46,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:18:46,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:18:46,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:18:46,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:18:46,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:18:46,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:18:46,954 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:18:46,955 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 12:18:47,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212adf6b9/ed9896b9e08b496499be4faa266a2394/FLAG61b0e7abc [2020-08-18 12:18:47,542 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:18:47,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 12:18:47,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212adf6b9/ed9896b9e08b496499be4faa266a2394/FLAG61b0e7abc [2020-08-18 12:18:47,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212adf6b9/ed9896b9e08b496499be4faa266a2394 [2020-08-18 12:18:47,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:18:47,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:18:47,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:18:47,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:18:47,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:18:47,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:18:47" (1/1) ... [2020-08-18 12:18:47,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363f8acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:47, skipping insertion in model container [2020-08-18 12:18:47,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:18:47" (1/1) ... [2020-08-18 12:18:47,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:18:47,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:18:48,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:18:48,604 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:18:49,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:18:49,175 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:18:49,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49 WrapperNode [2020-08-18 12:18:49,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:18:49,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:18:49,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:18:49,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:18:49,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... [2020-08-18 12:18:49,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:18:49,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:18:49,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:18:49,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:18:49,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:18:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:18:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:18:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 12:18:49,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:18:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:18:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 12:18:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 12:18:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 12:18:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:18:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 12:18:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 12:18:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 12:18:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 12:18:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 12:18:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 12:18:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 12:18:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 12:18:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:18:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:18:49,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:18:51,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:18:51,168 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:18:51,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:18:51 BoogieIcfgContainer [2020-08-18 12:18:51,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:18:51,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:18:51,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:18:51,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:18:51,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:18:47" (1/3) ... [2020-08-18 12:18:51,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d7395b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:18:51, skipping insertion in model container [2020-08-18 12:18:51,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:18:49" (2/3) ... [2020-08-18 12:18:51,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d7395b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:18:51, skipping insertion in model container [2020-08-18 12:18:51,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:18:51" (3/3) ... [2020-08-18 12:18:51,187 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-18 12:18:51,198 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:18:51,207 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-18 12:18:51,223 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-18 12:18:51,252 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:18:51,252 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:18:51,253 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:18:51,253 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:18:51,253 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:18:51,253 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:18:51,253 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:18:51,254 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:18:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-18 12:18:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 12:18:51,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:51,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:51,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-18 12:18:51,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:51,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740874231] [2020-08-18 12:18:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:52,354 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:18:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:52,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740874231] [2020-08-18 12:18:52,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:52,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:18:52,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130634203] [2020-08-18 12:18:52,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:18:52,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:18:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:18:52,503 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-18 12:18:52,813 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 12:18:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:55,355 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-18 12:18:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:18:55,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 12:18:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:55,378 INFO L225 Difference]: With dead ends: 754 [2020-08-18 12:18:55,379 INFO L226 Difference]: Without dead ends: 593 [2020-08-18 12:18:55,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:18:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-18 12:18:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-18 12:18:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-18 12:18:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-18 12:18:55,472 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-18 12:18:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:55,473 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-18 12:18:55,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:18:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-18 12:18:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 12:18:55,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:55,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:55,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:18:55,480 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-18 12:18:55,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:55,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792970487] [2020-08-18 12:18:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:55,945 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:18:55,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792970487] [2020-08-18 12:18:55,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:55,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:18:55,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133513269] [2020-08-18 12:18:55,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:18:55,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:18:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:18:55,996 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-18 12:18:56,232 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 12:18:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:58,296 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-18 12:18:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:18:58,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 12:18:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:58,307 INFO L225 Difference]: With dead ends: 1190 [2020-08-18 12:18:58,308 INFO L226 Difference]: Without dead ends: 961 [2020-08-18 12:18:58,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:18:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-18 12:18:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-18 12:18:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-18 12:18:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-18 12:18:58,399 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-18 12:18:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:58,401 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-18 12:18:58,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:18:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-18 12:18:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 12:18:58,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:58,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:58,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:18:58,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-18 12:18:58,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:58,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562416518] [2020-08-18 12:18:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:58,829 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:18:58,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:58,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562416518] [2020-08-18 12:18:58,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:58,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:18:58,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709931851] [2020-08-18 12:18:58,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:18:58,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:18:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:18:58,875 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-18 12:18:59,181 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-18 12:19:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:01,313 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-18 12:19:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:01,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-18 12:19:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:01,329 INFO L225 Difference]: With dead ends: 2090 [2020-08-18 12:19:01,329 INFO L226 Difference]: Without dead ends: 1701 [2020-08-18 12:19:01,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-18 12:19:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-18 12:19:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-18 12:19:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-18 12:19:01,426 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-18 12:19:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:01,427 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-18 12:19:01,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:19:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-18 12:19:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 12:19:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:01,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:01,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:19:01,436 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-18 12:19:01,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:01,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924195166] [2020-08-18 12:19:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:01,952 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:01,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:02,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924195166] [2020-08-18 12:19:02,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:02,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:02,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738851791] [2020-08-18 12:19:02,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:02,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:02,017 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-18 12:19:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:05,495 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-18 12:19:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:05,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 12:19:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:05,519 INFO L225 Difference]: With dead ends: 4967 [2020-08-18 12:19:05,519 INFO L226 Difference]: Without dead ends: 3281 [2020-08-18 12:19:05,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-18 12:19:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-18 12:19:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-18 12:19:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-18 12:19:05,692 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-18 12:19:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:05,693 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-18 12:19:05,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:19:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-18 12:19:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 12:19:05,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:05,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:05,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:19:05,702 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:05,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-18 12:19:05,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:05,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382178858] [2020-08-18 12:19:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:06,023 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:06,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:06,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382178858] [2020-08-18 12:19:06,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:06,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:19:06,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179229682] [2020-08-18 12:19:06,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:19:06,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:19:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:06,063 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-18 12:19:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:08,845 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-18 12:19:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:19:08,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-18 12:19:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:08,879 INFO L225 Difference]: With dead ends: 9659 [2020-08-18 12:19:08,879 INFO L226 Difference]: Without dead ends: 6456 [2020-08-18 12:19:08,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-18 12:19:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-18 12:19:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-18 12:19:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-18 12:19:09,059 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-18 12:19:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:09,059 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-18 12:19:09,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:19:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-18 12:19:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 12:19:09,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:09,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:09,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:19:09,066 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-18 12:19:09,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:09,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686949453] [2020-08-18 12:19:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:09,544 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:09,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686949453] [2020-08-18 12:19:09,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:09,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:09,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029388237] [2020-08-18 12:19:09,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:09,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:09,677 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-18 12:19:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:12,942 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-18 12:19:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:12,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-18 12:19:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:12,974 INFO L225 Difference]: With dead ends: 9441 [2020-08-18 12:19:12,975 INFO L226 Difference]: Without dead ends: 6238 [2020-08-18 12:19:12,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-18 12:19:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-18 12:19:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-18 12:19:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-18 12:19:13,263 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-18 12:19:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:13,263 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-18 12:19:13,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:19:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-18 12:19:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-18 12:19:13,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:13,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:13,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:19:13,280 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-18 12:19:13,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:13,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129432303] [2020-08-18 12:19:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:13,580 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:13,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:13,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129432303] [2020-08-18 12:19:13,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:13,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:19:13,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254918359] [2020-08-18 12:19:13,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:19:13,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:19:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:13,621 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-18 12:19:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:17,050 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-18 12:19:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:19:17,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-18 12:19:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:17,093 INFO L225 Difference]: With dead ends: 18492 [2020-08-18 12:19:17,094 INFO L226 Difference]: Without dead ends: 12348 [2020-08-18 12:19:17,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-18 12:19:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-18 12:19:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-18 12:19:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-18 12:19:17,410 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-18 12:19:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:17,411 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-18 12:19:17,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:19:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-18 12:19:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 12:19:17,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:17,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:17,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:19:17,421 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-18 12:19:17,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:17,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934970119] [2020-08-18 12:19:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:17,728 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:17,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:17,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934970119] [2020-08-18 12:19:17,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:17,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:19:17,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396878236] [2020-08-18 12:19:17,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:19:17,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:19:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:17,786 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-18 12:19:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:21,165 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-18 12:19:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:19:21,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-18 12:19:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:21,191 INFO L225 Difference]: With dead ends: 16495 [2020-08-18 12:19:21,192 INFO L226 Difference]: Without dead ends: 10615 [2020-08-18 12:19:21,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-18 12:19:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-18 12:19:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-18 12:19:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-18 12:19:21,744 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-18 12:19:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:21,744 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-18 12:19:21,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:19:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-18 12:19:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 12:19:21,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:21,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:21,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:19:21,765 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-18 12:19:21,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:21,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199649564] [2020-08-18 12:19:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:22,125 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:22,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:22,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199649564] [2020-08-18 12:19:22,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:22,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:22,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908711719] [2020-08-18 12:19:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:22,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:22,162 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-18 12:19:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:24,583 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-18 12:19:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:24,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-18 12:19:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:24,607 INFO L225 Difference]: With dead ends: 21564 [2020-08-18 12:19:24,607 INFO L226 Difference]: Without dead ends: 10851 [2020-08-18 12:19:24,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-18 12:19:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-18 12:19:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-18 12:19:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-18 12:19:25,070 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-18 12:19:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:25,070 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-18 12:19:25,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:19:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-18 12:19:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 12:19:25,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:25,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:25,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:19:25,086 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-18 12:19:25,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:25,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145916099] [2020-08-18 12:19:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:25,464 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:25,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:25,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145916099] [2020-08-18 12:19:25,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:25,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:25,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203854319] [2020-08-18 12:19:25,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:25,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:25,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:25,649 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-18 12:19:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:28,847 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-18 12:19:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:28,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-18 12:19:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:28,867 INFO L225 Difference]: With dead ends: 15230 [2020-08-18 12:19:28,867 INFO L226 Difference]: Without dead ends: 10851 [2020-08-18 12:19:28,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-18 12:19:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-18 12:19:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-18 12:19:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-18 12:19:29,296 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-18 12:19:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:29,296 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-18 12:19:29,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:19:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-18 12:19:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 12:19:29,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:29,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:29,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:19:29,309 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-18 12:19:29,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:29,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527860882] [2020-08-18 12:19:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:29,616 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:29,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527860882] [2020-08-18 12:19:29,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:29,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:19:29,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124955722] [2020-08-18 12:19:29,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:19:29,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:19:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:29,674 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-18 12:19:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:33,491 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-18 12:19:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:19:33,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-18 12:19:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:33,517 INFO L225 Difference]: With dead ends: 25409 [2020-08-18 12:19:33,518 INFO L226 Difference]: Without dead ends: 21030 [2020-08-18 12:19:33,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:19:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-18 12:19:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-18 12:19:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-18 12:19:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-18 12:19:34,164 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-18 12:19:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:34,165 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-18 12:19:34,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:19:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-18 12:19:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 12:19:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:34,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:34,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:19:34,176 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-18 12:19:34,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:34,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102696945] [2020-08-18 12:19:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:34,550 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:34,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:34,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102696945] [2020-08-18 12:19:34,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:34,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:34,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062000099] [2020-08-18 12:19:34,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:34,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:34,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:34,634 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-18 12:19:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:37,861 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-18 12:19:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:37,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 12:19:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:37,885 INFO L225 Difference]: With dead ends: 30843 [2020-08-18 12:19:37,885 INFO L226 Difference]: Without dead ends: 20313 [2020-08-18 12:19:37,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-18 12:19:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-18 12:19:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-18 12:19:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-18 12:19:38,838 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-18 12:19:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:19:38,838 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-18 12:19:38,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:19:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-18 12:19:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 12:19:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:19:38,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:19:38,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:19:38,855 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:19:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:19:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-18 12:19:38,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:19:38,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114605569] [2020-08-18 12:19:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:19:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:39,211 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-18 12:19:39,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:19:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:19:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:19:39,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114605569] [2020-08-18 12:19:39,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:19:39,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:19:39,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602636753] [2020-08-18 12:19:39,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:19:39,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:19:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:19:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:19:39,271 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states. [2020-08-18 12:19:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:19:43,980 INFO L93 Difference]: Finished difference Result 54646 states and 77842 transitions. [2020-08-18 12:19:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:19:43,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 12:19:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:19:44,011 INFO L225 Difference]: With dead ends: 54646 [2020-08-18 12:19:44,011 INFO L226 Difference]: Without dead ends: 34484 [2020-08-18 12:19:44,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:19:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34484 states.