/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:18:38,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:18:38,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:18:38,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:18:38,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:18:38,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:18:38,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:18:38,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:18:38,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:18:38,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:18:38,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:18:38,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:18:38,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:18:38,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:18:38,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:18:38,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:18:38,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:18:38,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:18:38,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:18:38,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:18:38,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:18:38,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:18:38,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:18:38,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:18:38,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:18:38,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:18:38,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:18:38,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:18:38,558 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 [2020-08-22 02:18:38,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:18:38,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:18:38,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:18:38,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:18:38,603 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:18:38,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:18:38,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:18:38,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:18:38,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:18:38,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:18:38,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:18:38,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:18:38,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:18:38,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:18:38,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:18:38,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:18:38,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:18:38,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:18:38,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:18:38,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:18:38,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:18:38,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:18:38,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:18:38,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:18:38,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:18:38,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:18:38,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:18:38,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:18:38,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:18:38,609 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:18:38,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:18:38,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:18:38,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:18:38,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:18:38,960 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:18:38,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-22 02:18:39,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2026717ec/ee160d3bd40541bdadca810d7e80f047/FLAG82496db9d [2020-08-22 02:18:39,609 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:18:39,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-22 02:18:39,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2026717ec/ee160d3bd40541bdadca810d7e80f047/FLAG82496db9d [2020-08-22 02:18:39,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2026717ec/ee160d3bd40541bdadca810d7e80f047 [2020-08-22 02:18:39,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:18:39,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:18:39,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:18:39,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:18:39,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:18:39,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:18:39" (1/1) ... [2020-08-22 02:18:39,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce6acaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:39, skipping insertion in model container [2020-08-22 02:18:39,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:18:39" (1/1) ... [2020-08-22 02:18:39,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:18:40,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:18:40,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:18:40,588 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:18:40,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:18:40,857 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:18:40,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40 WrapperNode [2020-08-22 02:18:40,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:18:40,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:18:40,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:18:40,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:18:40,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:40,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:40,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:40,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:40,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:40,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:41,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (1/1) ... [2020-08-22 02:18:41,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:18:41,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:18:41,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:18:41,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:18:41,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (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 [2020-08-22 02:18:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:18:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:18:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-22 02:18:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:18:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-22 02:18:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:18:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:18:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 02:18:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:18:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:18:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:18:42,646 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:18:42,646 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:18:42,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:18:42 BoogieIcfgContainer [2020-08-22 02:18:42,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:18:42,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:18:42,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:18:42,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:18:42,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:18:39" (1/3) ... [2020-08-22 02:18:42,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956d868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:18:42, skipping insertion in model container [2020-08-22 02:18:42,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:18:40" (2/3) ... [2020-08-22 02:18:42,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6956d868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:18:42, skipping insertion in model container [2020-08-22 02:18:42,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:18:42" (3/3) ... [2020-08-22 02:18:42,661 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-22 02:18:42,673 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:18:42,681 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:18:42,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:18:42,722 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:18:42,722 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:18:42,722 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:18:42,723 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:18:42,723 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:18:42,723 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:18:42,723 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:18:42,723 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:18:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-22 02:18:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 02:18:42,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:42,756 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] [2020-08-22 02:18:42,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-22 02:18:42,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:42,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456373741] [2020-08-22 02:18:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:43,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:18:43,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456373741] [2020-08-22 02:18:43,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:18:43,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:18:43,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92631531] [2020-08-22 02:18:43,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:18:43,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:18:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:18:43,219 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-22 02:18:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:18:46,202 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-22 02:18:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:18:46,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-22 02:18:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:18:46,250 INFO L225 Difference]: With dead ends: 886 [2020-08-22 02:18:46,250 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 02:18:46,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:18:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 02:18:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-22 02:18:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-22 02:18:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-22 02:18:46,447 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-22 02:18:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:18:46,448 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-22 02:18:46,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:18:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-22 02:18:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-22 02:18:46,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:46,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:18:46,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:18:46,458 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-22 02:18:46,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:46,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903079878] [2020-08-22 02:18:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:46,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:18:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:18:46,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903079878] [2020-08-22 02:18:46,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:18:46,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:18:46,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731440762] [2020-08-22 02:18:46,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:18:46,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:18:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:18:46,745 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-22 02:18:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:18:48,772 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-22 02:18:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:18:48,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-22 02:18:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:18:48,781 INFO L225 Difference]: With dead ends: 1518 [2020-08-22 02:18:48,782 INFO L226 Difference]: Without dead ends: 964 [2020-08-22 02:18:48,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:18:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-22 02:18:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-22 02:18:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-22 02:18:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-22 02:18:48,848 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-22 02:18:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:18:48,852 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-22 02:18:48,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:18:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-22 02:18:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 02:18:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:48,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:18:48,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:18:48,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-22 02:18:48,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:48,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765761455] [2020-08-22 02:18:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:48,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:49,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:18:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:18:49,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765761455] [2020-08-22 02:18:49,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:18:49,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:18:49,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298652484] [2020-08-22 02:18:49,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:18:49,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:18:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:18:49,298 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-22 02:18:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:18:51,344 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-22 02:18:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:18:51,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-22 02:18:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:18:51,366 INFO L225 Difference]: With dead ends: 2490 [2020-08-22 02:18:51,367 INFO L226 Difference]: Without dead ends: 1552 [2020-08-22 02:18:51,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:18:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-22 02:18:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-22 02:18:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-22 02:18:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-22 02:18:51,451 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-22 02:18:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:18:51,453 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-22 02:18:51,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:18:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-22 02:18:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-22 02:18:51,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:51,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:18:51,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:18:51,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-22 02:18:51,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:51,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116610901] [2020-08-22 02:18:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:51,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:51,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:18:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:51,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 02:18:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 02:18:51,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116610901] [2020-08-22 02:18:51,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:18:51,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 02:18:51,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858976299] [2020-08-22 02:18:51,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:18:51,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:18:51,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:18:51,844 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-22 02:18:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:18:53,765 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-22 02:18:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:18:53,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-22 02:18:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:18:53,781 INFO L225 Difference]: With dead ends: 3412 [2020-08-22 02:18:53,782 INFO L226 Difference]: Without dead ends: 1900 [2020-08-22 02:18:53,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:18:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-22 02:18:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-22 02:18:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-22 02:18:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-22 02:18:53,855 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-22 02:18:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:18:53,856 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-22 02:18:53,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:18:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-22 02:18:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-22 02:18:53,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:53,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:18:53,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:18:53,863 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-22 02:18:53,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:53,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123765207] [2020-08-22 02:18:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:54,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:54,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:18:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 02:18:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-22 02:18:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 02:18:54,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123765207] [2020-08-22 02:18:54,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:18:54,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:18:54,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438871753] [2020-08-22 02:18:54,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:18:54,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:54,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:18:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:18:54,703 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-22 02:18:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:18:57,651 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-22 02:18:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 02:18:57,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-22 02:18:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:18:57,661 INFO L225 Difference]: With dead ends: 3677 [2020-08-22 02:18:57,662 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 02:18:57,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:18:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 02:18:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-22 02:18:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-22 02:18:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-22 02:18:57,725 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-22 02:18:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:18:57,726 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-22 02:18:57,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:18:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-22 02:18:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-22 02:18:57,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:18:57,735 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:18:57,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:18:57,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:18:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:18:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-22 02:18:57,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:18:57,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943554960] [2020-08-22 02:18:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:18:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:57,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:18:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:57,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:18:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:57,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:18:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:18:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:58,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 02:18:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:18:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 02:18:58,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943554960] [2020-08-22 02:18:58,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:18:58,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:18:58,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987586298] [2020-08-22 02:18:58,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:18:58,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:18:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:18:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:18:58,411 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-22 02:19:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:03,014 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-22 02:19:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 02:19:03,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-22 02:19:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:03,036 INFO L225 Difference]: With dead ends: 5238 [2020-08-22 02:19:03,037 INFO L226 Difference]: Without dead ends: 3356 [2020-08-22 02:19:03,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-22 02:19:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-22 02:19:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-22 02:19:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-22 02:19:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-22 02:19:03,122 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-22 02:19:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:03,123 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-22 02:19:03,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:19:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-22 02:19:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-22 02:19:03,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:03,140 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:03,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:19:03,141 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-22 02:19:03,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:03,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581694921] [2020-08-22 02:19:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 02:19:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:03,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 02:19:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-22 02:19:04,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581694921] [2020-08-22 02:19:04,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:04,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:19:04,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876342736] [2020-08-22 02:19:04,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:19:04,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:04,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:19:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:19:04,476 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-22 02:19:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:07,509 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-22 02:19:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 02:19:07,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-22 02:19:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:07,525 INFO L225 Difference]: With dead ends: 5701 [2020-08-22 02:19:07,526 INFO L226 Difference]: Without dead ends: 3400 [2020-08-22 02:19:07,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:19:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-22 02:19:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-22 02:19:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-22 02:19:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-22 02:19:07,608 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-22 02:19:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:07,608 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-22 02:19:07,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:19:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-22 02:19:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-22 02:19:07,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:07,626 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:07,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:19:07,627 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-22 02:19:07,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:07,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049971690] [2020-08-22 02:19:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:07,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:07,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:07,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 02:19:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-22 02:19:08,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049971690] [2020-08-22 02:19:08,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:08,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:19:08,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660782644] [2020-08-22 02:19:08,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:19:08,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:19:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:19:08,670 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-22 02:19:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:11,689 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-22 02:19:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 02:19:11,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-22 02:19:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:11,703 INFO L225 Difference]: With dead ends: 5994 [2020-08-22 02:19:11,703 INFO L226 Difference]: Without dead ends: 3192 [2020-08-22 02:19:11,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-22 02:19:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-22 02:19:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-22 02:19:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-22 02:19:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-22 02:19:11,789 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-22 02:19:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:11,790 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-22 02:19:11,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:19:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-22 02:19:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-22 02:19:11,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:11,800 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:11,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:19:11,800 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-22 02:19:11,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:11,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616787518] [2020-08-22 02:19:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-22 02:19:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 02:19:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-22 02:19:12,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616787518] [2020-08-22 02:19:12,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:12,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:19:12,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959468588] [2020-08-22 02:19:12,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:19:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:19:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:19:12,906 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-22 02:19:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:15,229 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-22 02:19:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:19:15,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-22 02:19:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:15,244 INFO L225 Difference]: With dead ends: 6354 [2020-08-22 02:19:15,244 INFO L226 Difference]: Without dead ends: 3364 [2020-08-22 02:19:15,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:19:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-22 02:19:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-22 02:19:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-22 02:19:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-22 02:19:15,324 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-22 02:19:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:15,325 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-22 02:19:15,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:19:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-22 02:19:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-22 02:19:15,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:15,337 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:15,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:19:15,338 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-22 02:19:15,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:15,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162732702] [2020-08-22 02:19:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 02:19:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:15,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-22 02:19:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-22 02:19:16,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162732702] [2020-08-22 02:19:16,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:16,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:19:16,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006614035] [2020-08-22 02:19:16,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:19:16,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:16,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:19:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:19:16,746 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-22 02:19:17,887 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-08-22 02:19:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:20,321 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-22 02:19:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 02:19:20,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-22 02:19:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:20,342 INFO L225 Difference]: With dead ends: 6540 [2020-08-22 02:19:20,342 INFO L226 Difference]: Without dead ends: 3552 [2020-08-22 02:19:20,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-22 02:19:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-22 02:19:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-22 02:19:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-22 02:19:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-22 02:19:20,421 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-22 02:19:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:20,422 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-22 02:19:20,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:19:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-22 02:19:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-22 02:19:20,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:20,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:20,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:19:20,433 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-22 02:19:20,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:20,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045160567] [2020-08-22 02:19:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 02:19:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:20,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 02:19:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-22 02:19:21,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045160567] [2020-08-22 02:19:21,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:21,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:19:21,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987166495] [2020-08-22 02:19:21,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:19:21,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:19:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:19:21,368 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-22 02:19:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:22,767 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-22 02:19:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 02:19:22,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-22 02:19:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:22,785 INFO L225 Difference]: With dead ends: 8032 [2020-08-22 02:19:22,785 INFO L226 Difference]: Without dead ends: 4674 [2020-08-22 02:19:22,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:19:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-22 02:19:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-22 02:19:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-22 02:19:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-22 02:19:22,882 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-22 02:19:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:22,884 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-22 02:19:22,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:19:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-22 02:19:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-22 02:19:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:22,898 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:22,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:19:22,899 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-22 02:19:22,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:22,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630650239] [2020-08-22 02:19:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 02:19:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-22 02:19:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 02:19:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-22 02:19:23,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630650239] [2020-08-22 02:19:23,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:23,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 02:19:23,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492387948] [2020-08-22 02:19:23,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:19:23,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:19:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:19:23,584 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-22 02:19:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:24,822 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-22 02:19:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:19:24,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-22 02:19:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:24,839 INFO L225 Difference]: With dead ends: 4296 [2020-08-22 02:19:24,839 INFO L226 Difference]: Without dead ends: 4294 [2020-08-22 02:19:24,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:19:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-22 02:19:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-22 02:19:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-22 02:19:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-22 02:19:24,912 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-22 02:19:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:24,913 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-22 02:19:24,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:19:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-22 02:19:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-22 02:19:24,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:24,927 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:24,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:19:24,928 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-22 02:19:24,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:24,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41891231] [2020-08-22 02:19:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 02:19:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 02:19:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 02:19:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 02:19:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-22 02:19:25,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41891231] [2020-08-22 02:19:25,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:25,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 02:19:25,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713028424] [2020-08-22 02:19:25,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:19:25,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:19:25,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:19:25,695 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-22 02:19:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:26,973 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-22 02:19:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:19:26,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-22 02:19:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:26,995 INFO L225 Difference]: With dead ends: 9128 [2020-08-22 02:19:26,995 INFO L226 Difference]: Without dead ends: 5026 [2020-08-22 02:19:27,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:19:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-22 02:19:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-22 02:19:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-22 02:19:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-22 02:19:27,102 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-22 02:19:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:27,103 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-22 02:19:27,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:19:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-22 02:19:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-22 02:19:27,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:19:27,118 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:19:27,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:19:27,119 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:19:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:19:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-22 02:19:27,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:19:27,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562572076] [2020-08-22 02:19:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:19:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:19:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 02:19:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 02:19:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 02:19:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 02:19:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 02:19:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 02:19:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:27,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 02:19:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:19:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-22 02:19:28,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562572076] [2020-08-22 02:19:28,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:19:28,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 02:19:28,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364233652] [2020-08-22 02:19:28,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:19:28,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:19:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:19:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:19:28,028 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-22 02:19:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:19:31,305 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-22 02:19:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 02:19:31,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-22 02:19:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:19:31,308 INFO L225 Difference]: With dead ends: 5032 [2020-08-22 02:19:31,308 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:19:31,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:19:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:19:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:19:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:19:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:19:31,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-22 02:19:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:19:31,319 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:19:31,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:19:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:19:31,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:19:31,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:19:31,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:19:31,911 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-22 02:19:32,118 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-22 02:19:33,684 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 250 DAG size of output: 61