/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:43:13,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:43:14,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:43:14,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:43:14,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:43:14,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:43:14,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:43:14,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:43:14,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:43:14,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:43:14,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:43:14,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-09-04 17:43:14,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:43:14,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:43:14,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:43:14,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:43:14,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:43:14,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:43:14,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:43:14,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:43:14,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:43:14,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:43:14,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:43:14,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:43:14,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:43:14,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:43:14,108 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:43:14,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:43:14,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:43:14,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:14,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:43:14,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:43:14,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:43:14,110 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:43:14,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:43:14,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:43:14,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:43:14,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:43:14,635 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:43:14,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-04 17:43:14,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1325dfc6f/1cbae24f4ee440b29951e3c8cfe5acbf/FLAGcab4ef1d9 [2020-09-04 17:43:15,275 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:43:15,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-04 17:43:15,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1325dfc6f/1cbae24f4ee440b29951e3c8cfe5acbf/FLAGcab4ef1d9 [2020-09-04 17:43:15,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1325dfc6f/1cbae24f4ee440b29951e3c8cfe5acbf [2020-09-04 17:43:15,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:43:15,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:43:15,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:15,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:43:15,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:43:15,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:15" (1/1) ... [2020-09-04 17:43:15,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685b9512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:15, skipping insertion in model container [2020-09-04 17:43:15,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:15" (1/1) ... [2020-09-04 17:43:15,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:43:15,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:43:15,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:15,961 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:43:15,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:16,000 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:43:16,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16 WrapperNode [2020-09-04 17:43:16,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:16,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:43:16,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:43:16,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:43:16,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (1/1) ... [2020-09-04 17:43:16,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:43:16,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:43:16,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:43:16,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:43:16,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (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 [2020-09-04 17:43:16,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:43:16,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:43:16,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:43:16,217 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-04 17:43:16,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:43:16,217 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:43:16,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:43:16,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:43:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 17:43:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:43:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 17:43:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:43:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:43:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 17:43:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:43:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:43:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:43:16,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:43:16,581 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:43:16,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:16 BoogieIcfgContainer [2020-09-04 17:43:16,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:43:16,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:43:16,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:43:16,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:43:16,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:43:15" (1/3) ... [2020-09-04 17:43:16,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef1a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:16, skipping insertion in model container [2020-09-04 17:43:16,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:16" (2/3) ... [2020-09-04 17:43:16,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef1a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:16, skipping insertion in model container [2020-09-04 17:43:16,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:16" (3/3) ... [2020-09-04 17:43:16,597 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-04 17:43:16,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:43:16,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:43:16,638 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:43:16,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:43:16,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:43:16,665 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:43:16,665 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:43:16,665 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:43:16,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:43:16,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:43:16,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:43:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-04 17:43:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:43:16,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:16,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:43:16,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-04 17:43:16,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:16,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625907132] [2020-09-04 17:43:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:16,791 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:16,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:16,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:17,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625907132] [2020-09-04 17:43:17,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:17,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:43:17,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247437986] [2020-09-04 17:43:17,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:43:17,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:43:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:43:17,065 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-04 17:43:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:17,301 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-04 17:43:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:43:17,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-04 17:43:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:17,318 INFO L225 Difference]: With dead ends: 94 [2020-09-04 17:43:17,319 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 17:43:17,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 17:43:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-04 17:43:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 17:43:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-04 17:43:17,385 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-04 17:43:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:17,385 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-04 17:43:17,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:43:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-04 17:43:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:43:17,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:17,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:43:17,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:43:17,388 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-04 17:43:17,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:17,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597472063] [2020-09-04 17:43:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:17,393 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:17,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597472063] [2020-09-04 17:43:17,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:17,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:43:17,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212804435] [2020-09-04 17:43:17,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:43:17,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:43:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:17,635 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-04 17:43:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:17,916 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-04 17:43:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:43:17,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-04 17:43:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:17,918 INFO L225 Difference]: With dead ends: 81 [2020-09-04 17:43:17,918 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 17:43:17,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:43:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 17:43:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-04 17:43:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 17:43:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-04 17:43:17,935 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-04 17:43:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:17,935 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-04 17:43:17,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:43:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-04 17:43:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:43:17,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:17,937 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] [2020-09-04 17:43:17,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:43:17,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-09-04 17:43:17,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:17,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649527718] [2020-09-04 17:43:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:17,967 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:18,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649527718] [2020-09-04 17:43:18,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:18,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:43:18,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325625055] [2020-09-04 17:43:18,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:43:18,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:43:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:43:18,247 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-04 17:43:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:18,570 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-04 17:43:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:43:18,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-04 17:43:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:18,572 INFO L225 Difference]: With dead ends: 87 [2020-09-04 17:43:18,573 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 17:43:18,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:43:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 17:43:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-04 17:43:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 17:43:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-04 17:43:18,591 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-04 17:43:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:18,592 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-04 17:43:18,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:43:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-04 17:43:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:43:18,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:18,595 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 17:43:18,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:43:18,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-09-04 17:43:18,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:18,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530058990] [2020-09-04 17:43:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:18,619 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:18,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530058990] [2020-09-04 17:43:18,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:18,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:43:18,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804537793] [2020-09-04 17:43:18,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:43:18,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:43:18,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:18,764 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-09-04 17:43:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:18,951 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-09-04 17:43:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:43:18,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-04 17:43:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:18,955 INFO L225 Difference]: With dead ends: 86 [2020-09-04 17:43:18,955 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 17:43:18,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:43:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 17:43:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-09-04 17:43:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 17:43:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-09-04 17:43:18,973 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-09-04 17:43:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:18,973 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-09-04 17:43:18,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:43:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-09-04 17:43:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 17:43:18,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:18,975 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 17:43:18,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:43:18,976 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash 272366111, now seen corresponding path program 1 times [2020-09-04 17:43:18,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:18,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306966891] [2020-09-04 17:43:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:18,984 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:19,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306966891] [2020-09-04 17:43:19,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:19,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:43:19,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249571388] [2020-09-04 17:43:19,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:43:19,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:43:19,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:19,081 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-09-04 17:43:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:19,307 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-09-04 17:43:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:43:19,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-09-04 17:43:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:19,309 INFO L225 Difference]: With dead ends: 95 [2020-09-04 17:43:19,310 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 17:43:19,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:43:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 17:43:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-04 17:43:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 17:43:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-04 17:43:19,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-09-04 17:43:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:19,331 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-04 17:43:19,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:43:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-04 17:43:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 17:43:19,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:19,335 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 17:43:19,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:43:19,336 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:19,336 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-09-04 17:43:19,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:19,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066150815] [2020-09-04 17:43:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:19,348 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:19,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066150815] [2020-09-04 17:43:19,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:19,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:43:19,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45237311] [2020-09-04 17:43:19,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:43:19,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:43:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:43:19,701 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-09-04 17:43:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:20,107 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-09-04 17:43:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:43:20,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-04 17:43:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:20,109 INFO L225 Difference]: With dead ends: 113 [2020-09-04 17:43:20,109 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 17:43:20,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:43:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 17:43:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-04 17:43:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 17:43:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-04 17:43:20,122 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-09-04 17:43:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:20,122 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-04 17:43:20,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:43:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-04 17:43:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 17:43:20,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:20,124 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:43:20,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:43:20,124 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 809903117, now seen corresponding path program 3 times [2020-09-04 17:43:20,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:20,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727116538] [2020-09-04 17:43:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:20,130 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:20,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727116538] [2020-09-04 17:43:20,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:20,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:43:20,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84790573] [2020-09-04 17:43:20,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:43:20,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:43:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:43:20,582 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-09-04 17:43:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:21,039 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-09-04 17:43:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:43:21,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-04 17:43:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:21,041 INFO L225 Difference]: With dead ends: 119 [2020-09-04 17:43:21,041 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 17:43:21,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:43:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 17:43:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-04 17:43:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 17:43:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-04 17:43:21,055 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-09-04 17:43:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:21,055 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-04 17:43:21,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:43:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-04 17:43:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 17:43:21,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:21,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-09-04 17:43:21,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:43:21,057 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 577206281, now seen corresponding path program 4 times [2020-09-04 17:43:21,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:21,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895667467] [2020-09-04 17:43:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:21,067 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:21,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895667467] [2020-09-04 17:43:21,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:21,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:43:21,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795151464] [2020-09-04 17:43:21,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:43:21,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:43:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:43:21,551 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-04 17:43:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:22,109 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-09-04 17:43:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:43:22,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 17:43:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:22,111 INFO L225 Difference]: With dead ends: 125 [2020-09-04 17:43:22,111 INFO L226 Difference]: Without dead ends: 88 [2020-09-04 17:43:22,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:43:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-04 17:43:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-04 17:43:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 17:43:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-09-04 17:43:22,126 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-09-04 17:43:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:22,127 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-09-04 17:43:22,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:43:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-09-04 17:43:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 17:43:22,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:22,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-09-04 17:43:22,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:43:22,129 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -274669819, now seen corresponding path program 5 times [2020-09-04 17:43:22,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:22,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757180732] [2020-09-04 17:43:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:22,136 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:22,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757180732] [2020-09-04 17:43:22,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:22,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 17:43:22,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278166507] [2020-09-04 17:43:22,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 17:43:22,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 17:43:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:43:22,744 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-09-04 17:43:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:23,351 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-09-04 17:43:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:43:23,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 17:43:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:23,353 INFO L225 Difference]: With dead ends: 131 [2020-09-04 17:43:23,353 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 17:43:23,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:43:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 17:43:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-04 17:43:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 17:43:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-09-04 17:43:23,366 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-09-04 17:43:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:23,366 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-09-04 17:43:23,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 17:43:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-09-04 17:43:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 17:43:23,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:23,368 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-09-04 17:43:23,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:43:23,368 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -61335295, now seen corresponding path program 6 times [2020-09-04 17:43:23,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:23,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437758403] [2020-09-04 17:43:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:23,374 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:23,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:24,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437758403] [2020-09-04 17:43:24,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-04 17:43:24,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456036693] [2020-09-04 17:43:24,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 17:43:24,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 17:43:24,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:43:24,046 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-09-04 17:43:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,874 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-09-04 17:43:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 17:43:24,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-04 17:43:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,875 INFO L225 Difference]: With dead ends: 137 [2020-09-04 17:43:24,876 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 17:43:24,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 17:43:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 17:43:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-04 17:43:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 17:43:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-09-04 17:43:24,887 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-09-04 17:43:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,888 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-09-04 17:43:24,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 17:43:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-09-04 17:43:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 17:43:24,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,889 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2020-09-04 17:43:24,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:43:24,890 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1180506627, now seen corresponding path program 7 times [2020-09-04 17:43:24,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4436615] [2020-09-04 17:43:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,895 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:25,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4436615] [2020-09-04 17:43:25,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:25,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-04 17:43:25,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909897861] [2020-09-04 17:43:25,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 17:43:25,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 17:43:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-04 17:43:25,707 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-09-04 17:43:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:26,592 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-04 17:43:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 17:43:26,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-09-04 17:43:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:26,594 INFO L225 Difference]: With dead ends: 143 [2020-09-04 17:43:26,594 INFO L226 Difference]: Without dead ends: 106 [2020-09-04 17:43:26,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 17:43:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-04 17:43:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-04 17:43:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 17:43:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-09-04 17:43:26,618 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-09-04 17:43:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:26,618 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-09-04 17:43:26,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 17:43:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-09-04 17:43:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 17:43:26,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:26,620 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2020-09-04 17:43:26,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:43:26,621 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1632044537, now seen corresponding path program 8 times [2020-09-04 17:43:26,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:26,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364257922] [2020-09-04 17:43:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:26,630 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:27,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364257922] [2020-09-04 17:43:27,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:27,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-09-04 17:43:27,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807656067] [2020-09-04 17:43:27,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 17:43:27,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 17:43:27,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:43:27,600 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-09-04 17:43:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:28,695 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-09-04 17:43:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 17:43:28,696 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-09-04 17:43:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:28,697 INFO L225 Difference]: With dead ends: 149 [2020-09-04 17:43:28,697 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 17:43:28,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 17:43:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 17:43:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-09-04 17:43:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-04 17:43:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-09-04 17:43:28,716 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-09-04 17:43:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:28,716 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-09-04 17:43:28,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 17:43:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-09-04 17:43:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 17:43:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:28,717 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2020-09-04 17:43:28,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:43:28,718 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1313195787, now seen corresponding path program 9 times [2020-09-04 17:43:28,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:28,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36912818] [2020-09-04 17:43:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:28,723 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:28,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:29,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36912818] [2020-09-04 17:43:29,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:29,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-09-04 17:43:29,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435924671] [2020-09-04 17:43:29,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 17:43:29,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 17:43:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:43:29,880 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-09-04 17:43:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:31,238 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-09-04 17:43:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-04 17:43:31,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-09-04 17:43:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:31,240 INFO L225 Difference]: With dead ends: 155 [2020-09-04 17:43:31,240 INFO L226 Difference]: Without dead ends: 118 [2020-09-04 17:43:31,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 17:43:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-04 17:43:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-09-04 17:43:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 17:43:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-04 17:43:31,253 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-09-04 17:43:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:31,253 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-04 17:43:31,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 17:43:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-04 17:43:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 17:43:31,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:31,255 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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] [2020-09-04 17:43:31,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:43:31,255 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1440596239, now seen corresponding path program 10 times [2020-09-04 17:43:31,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:31,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276944690] [2020-09-04 17:43:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:31,266 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:31,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:31,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:32,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276944690] [2020-09-04 17:43:32,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:32,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-09-04 17:43:32,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416009089] [2020-09-04 17:43:32,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 17:43:32,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 17:43:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:43:32,518 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-09-04 17:43:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:33,832 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-04 17:43:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 17:43:33,832 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-09-04 17:43:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:33,833 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:43:33,834 INFO L226 Difference]: Without dead ends: 124 [2020-09-04 17:43:33,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 17:43:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-04 17:43:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-04 17:43:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-04 17:43:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-09-04 17:43:33,846 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-09-04 17:43:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:33,847 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-09-04 17:43:33,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 17:43:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-09-04 17:43:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 17:43:33,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:33,848 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2020-09-04 17:43:33,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:43:33,849 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1179965421, now seen corresponding path program 11 times [2020-09-04 17:43:33,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:33,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946275285] [2020-09-04 17:43:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:33,857 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:33,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:33,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:35,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946275285] [2020-09-04 17:43:35,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:35,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-09-04 17:43:35,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40308778] [2020-09-04 17:43:35,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 17:43:35,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 17:43:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:43:35,375 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-09-04 17:43:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:36,839 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-09-04 17:43:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-04 17:43:36,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-09-04 17:43:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:36,841 INFO L225 Difference]: With dead ends: 167 [2020-09-04 17:43:36,841 INFO L226 Difference]: Without dead ends: 130 [2020-09-04 17:43:36,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 17:43:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-04 17:43:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-04 17:43:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-04 17:43:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-09-04 17:43:36,854 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-09-04 17:43:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:36,854 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-09-04 17:43:36,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 17:43:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-09-04 17:43:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 17:43:36,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:36,856 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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] [2020-09-04 17:43:36,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:43:36,856 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash 987218921, now seen corresponding path program 12 times [2020-09-04 17:43:36,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:36,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156902578] [2020-09-04 17:43:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:36,865 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:36,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:36,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:38,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156902578] [2020-09-04 17:43:38,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:38,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-09-04 17:43:38,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216404859] [2020-09-04 17:43:38,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 17:43:38,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:38,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 17:43:38,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:43:38,546 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-09-04 17:43:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:40,067 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-09-04 17:43:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 17:43:40,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-09-04 17:43:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:40,069 INFO L225 Difference]: With dead ends: 173 [2020-09-04 17:43:40,069 INFO L226 Difference]: Without dead ends: 136 [2020-09-04 17:43:40,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 17:43:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-04 17:43:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-04 17:43:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 17:43:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-04 17:43:40,085 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-09-04 17:43:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:40,086 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-04 17:43:40,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 17:43:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-04 17:43:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 17:43:40,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:40,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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] [2020-09-04 17:43:40,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:43:40,088 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:40,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1327447323, now seen corresponding path program 13 times [2020-09-04 17:43:40,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:40,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632499930] [2020-09-04 17:43:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:40,096 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:40,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:40,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:41,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632499930] [2020-09-04 17:43:41,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:41,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-09-04 17:43:41,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842944502] [2020-09-04 17:43:41,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 17:43:41,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 17:43:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 17:43:41,739 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-09-04 17:43:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:43,712 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-09-04 17:43:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-04 17:43:43,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-09-04 17:43:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:43,714 INFO L225 Difference]: With dead ends: 179 [2020-09-04 17:43:43,714 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 17:43:43,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 17:43:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 17:43:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-04 17:43:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 17:43:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-04 17:43:43,729 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-09-04 17:43:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:43,729 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-04 17:43:43,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 17:43:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-04 17:43:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 17:43:43,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:43,730 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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] [2020-09-04 17:43:43,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:43:43,731 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash 39163105, now seen corresponding path program 14 times [2020-09-04 17:43:43,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:43,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540834012] [2020-09-04 17:43:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:43,738 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:43,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:45,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540834012] [2020-09-04 17:43:45,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:45,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-09-04 17:43:45,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475832779] [2020-09-04 17:43:45,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 17:43:45,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 17:43:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 17:43:45,596 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-09-04 17:43:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:47,640 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-09-04 17:43:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 17:43:47,641 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-09-04 17:43:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:47,642 INFO L225 Difference]: With dead ends: 185 [2020-09-04 17:43:47,643 INFO L226 Difference]: Without dead ends: 148 [2020-09-04 17:43:47,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 17:43:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-04 17:43:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-04 17:43:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 17:43:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-04 17:43:47,660 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-09-04 17:43:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:47,660 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-04 17:43:47,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 17:43:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-04 17:43:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 17:43:47,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:47,662 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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] [2020-09-04 17:43:47,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:43:47,662 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1976302045, now seen corresponding path program 15 times [2020-09-04 17:43:47,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:47,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359509091] [2020-09-04 17:43:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:47,668 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:47,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:47,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:49,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359509091] [2020-09-04 17:43:49,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:49,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-09-04 17:43:49,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253744287] [2020-09-04 17:43:49,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 17:43:49,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:49,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 17:43:49,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 17:43:49,686 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-09-04 17:43:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:51,828 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-04 17:43:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-04 17:43:51,829 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-09-04 17:43:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:51,830 INFO L225 Difference]: With dead ends: 191 [2020-09-04 17:43:51,831 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 17:43:51,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 17:43:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 17:43:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-04 17:43:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 17:43:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-09-04 17:43:51,850 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-09-04 17:43:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:51,850 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-09-04 17:43:51,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 17:43:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-09-04 17:43:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 17:43:51,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:51,852 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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] [2020-09-04 17:43:51,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:43:51,852 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -91639335, now seen corresponding path program 16 times [2020-09-04 17:43:51,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:51,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686433014] [2020-09-04 17:43:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:51,863 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:51,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686433014] [2020-09-04 17:43:54,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:54,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-09-04 17:43:54,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837483398] [2020-09-04 17:43:54,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 17:43:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 17:43:54,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 17:43:54,079 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-09-04 17:43:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:56,473 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-09-04 17:43:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 17:43:56,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-09-04 17:43:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:56,475 INFO L225 Difference]: With dead ends: 197 [2020-09-04 17:43:56,475 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 17:43:56,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 17:43:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 17:43:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-04 17:43:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-04 17:43:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-09-04 17:43:56,499 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-09-04 17:43:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:56,500 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-09-04 17:43:56,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 17:43:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-09-04 17:43:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-04 17:43:56,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:56,502 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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] [2020-09-04 17:43:56,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:43:56,503 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash -461079339, now seen corresponding path program 17 times [2020-09-04 17:43:56,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:56,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806185558] [2020-09-04 17:43:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:56,511 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:56,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:56,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:43:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:59,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806185558] [2020-09-04 17:43:59,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:59,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-09-04 17:43:59,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637599279] [2020-09-04 17:43:59,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 17:43:59,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 17:43:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 17:43:59,025 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-09-04 17:44:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:01,728 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-04 17:44:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-04 17:44:01,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-09-04 17:44:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:01,730 INFO L225 Difference]: With dead ends: 203 [2020-09-04 17:44:01,730 INFO L226 Difference]: Without dead ends: 166 [2020-09-04 17:44:01,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 17:44:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-04 17:44:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-09-04 17:44:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 17:44:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-09-04 17:44:01,749 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-09-04 17:44:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:01,749 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-09-04 17:44:01,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 17:44:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-09-04 17:44:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 17:44:01,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:01,751 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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] [2020-09-04 17:44:01,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 17:44:01,751 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1469965615, now seen corresponding path program 18 times [2020-09-04 17:44:01,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:01,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444907985] [2020-09-04 17:44:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:01,759 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:04,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444907985] [2020-09-04 17:44:04,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:04,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-09-04 17:44:04,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621504291] [2020-09-04 17:44:04,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 17:44:04,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 17:44:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 17:44:04,473 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-09-04 17:44:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:07,519 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-09-04 17:44:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-04 17:44:07,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-09-04 17:44:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:07,524 INFO L225 Difference]: With dead ends: 209 [2020-09-04 17:44:07,524 INFO L226 Difference]: Without dead ends: 172 [2020-09-04 17:44:07,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 17:44:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-04 17:44:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-09-04 17:44:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 17:44:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-09-04 17:44:07,540 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-09-04 17:44:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:07,541 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-09-04 17:44:07,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 17:44:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-09-04 17:44:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-04 17:44:07,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:07,542 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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] [2020-09-04 17:44:07,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 17:44:07,542 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1753723955, now seen corresponding path program 19 times [2020-09-04 17:44:07,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:07,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708390591] [2020-09-04 17:44:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:07,551 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:07,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:10,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708390591] [2020-09-04 17:44:10,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:10,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-09-04 17:44:10,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083232324] [2020-09-04 17:44:10,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 17:44:10,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 17:44:10,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 17:44:10,472 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-09-04 17:44:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:13,584 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-09-04 17:44:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-04 17:44:13,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-09-04 17:44:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:13,586 INFO L225 Difference]: With dead ends: 215 [2020-09-04 17:44:13,586 INFO L226 Difference]: Without dead ends: 178 [2020-09-04 17:44:13,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 17:44:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-04 17:44:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-09-04 17:44:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-04 17:44:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-09-04 17:44:13,623 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-09-04 17:44:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:13,624 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-09-04 17:44:13,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 17:44:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-09-04 17:44:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-04 17:44:13,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:13,626 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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] [2020-09-04 17:44:13,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 17:44:13,627 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1681076279, now seen corresponding path program 20 times [2020-09-04 17:44:13,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:13,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666558269] [2020-09-04 17:44:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:13,634 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:13,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:13,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:16,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666558269] [2020-09-04 17:44:16,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-09-04 17:44:16,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800998629] [2020-09-04 17:44:16,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-04 17:44:16,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:16,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-04 17:44:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 17:44:16,753 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-09-04 17:44:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:20,364 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-09-04 17:44:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-04 17:44:20,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-09-04 17:44:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:20,367 INFO L225 Difference]: With dead ends: 221 [2020-09-04 17:44:20,367 INFO L226 Difference]: Without dead ends: 184 [2020-09-04 17:44:20,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 17:44:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-04 17:44:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-09-04 17:44:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-04 17:44:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-09-04 17:44:20,388 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-09-04 17:44:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:20,388 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-09-04 17:44:20,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-04 17:44:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-09-04 17:44:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 17:44:20,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:20,389 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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] [2020-09-04 17:44:20,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 17:44:20,390 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -199924027, now seen corresponding path program 21 times [2020-09-04 17:44:20,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:20,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476389715] [2020-09-04 17:44:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:20,396 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:20,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:23,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476389715] [2020-09-04 17:44:23,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:23,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-09-04 17:44:23,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446017343] [2020-09-04 17:44:23,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 17:44:23,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 17:44:23,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 17:44:23,782 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-09-04 17:44:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:27,463 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-09-04 17:44:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-09-04 17:44:27,464 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-09-04 17:44:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:27,465 INFO L225 Difference]: With dead ends: 227 [2020-09-04 17:44:27,466 INFO L226 Difference]: Without dead ends: 190 [2020-09-04 17:44:27,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 17:44:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-04 17:44:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-09-04 17:44:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 17:44:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-09-04 17:44:27,486 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-09-04 17:44:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:27,487 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-09-04 17:44:27,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 17:44:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-09-04 17:44:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-04 17:44:27,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:27,488 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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] [2020-09-04 17:44:27,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 17:44:27,489 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -273166143, now seen corresponding path program 22 times [2020-09-04 17:44:27,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:27,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293576999] [2020-09-04 17:44:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:27,497 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:27,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:31,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293576999] [2020-09-04 17:44:31,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:31,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-09-04 17:44:31,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930536470] [2020-09-04 17:44:31,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-04 17:44:31,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-04 17:44:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 17:44:31,157 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-09-04 17:44:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:35,055 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-09-04 17:44:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-04 17:44:35,056 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-09-04 17:44:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:35,057 INFO L225 Difference]: With dead ends: 233 [2020-09-04 17:44:35,058 INFO L226 Difference]: Without dead ends: 196 [2020-09-04 17:44:35,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 17:44:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-04 17:44:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-09-04 17:44:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-04 17:44:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-09-04 17:44:35,086 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-09-04 17:44:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:35,086 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-09-04 17:44:35,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-04 17:44:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-09-04 17:44:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-04 17:44:35,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:35,088 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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] [2020-09-04 17:44:35,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 17:44:35,089 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1429615171, now seen corresponding path program 23 times [2020-09-04 17:44:35,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:35,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097585933] [2020-09-04 17:44:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:35,100 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:35,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:35,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:39,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097585933] [2020-09-04 17:44:39,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:39,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-09-04 17:44:39,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602111891] [2020-09-04 17:44:39,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 17:44:39,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 17:44:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 17:44:39,042 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-09-04 17:44:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:43,204 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-09-04 17:44:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-09-04 17:44:43,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-09-04 17:44:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:43,207 INFO L225 Difference]: With dead ends: 239 [2020-09-04 17:44:43,207 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 17:44:43,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 17:44:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 17:44:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-09-04 17:44:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-04 17:44:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-09-04 17:44:43,235 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-09-04 17:44:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:43,236 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-09-04 17:44:43,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 17:44:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-09-04 17:44:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-04 17:44:43,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:43,237 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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] [2020-09-04 17:44:43,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 17:44:43,238 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash -904847943, now seen corresponding path program 24 times [2020-09-04 17:44:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:43,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971560810] [2020-09-04 17:44:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:43,243 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:47,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971560810] [2020-09-04 17:44:47,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:47,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-09-04 17:44:47,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468274763] [2020-09-04 17:44:47,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 17:44:47,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 17:44:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 17:44:47,521 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-09-04 17:44:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:51,958 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-09-04 17:44:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-04 17:44:51,959 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-09-04 17:44:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:51,962 INFO L225 Difference]: With dead ends: 245 [2020-09-04 17:44:51,962 INFO L226 Difference]: Without dead ends: 208 [2020-09-04 17:44:51,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-09-04 17:44:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-04 17:44:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-09-04 17:44:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 17:44:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-09-04 17:44:51,996 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-09-04 17:44:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:51,997 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-09-04 17:44:51,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 17:44:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-09-04 17:44:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-04 17:44:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:51,998 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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] [2020-09-04 17:44:51,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 17:44:51,999 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash 922976437, now seen corresponding path program 25 times [2020-09-04 17:44:51,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:51,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785253515] [2020-09-04 17:44:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:52,013 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:52,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:52,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:44:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:56,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785253515] [2020-09-04 17:44:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:56,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-09-04 17:44:56,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977229091] [2020-09-04 17:44:56,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 17:44:56,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 17:44:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 17:44:56,596 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-09-04 17:45:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:01,501 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-09-04 17:45:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-09-04 17:45:01,502 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-09-04 17:45:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:01,504 INFO L225 Difference]: With dead ends: 251 [2020-09-04 17:45:01,504 INFO L226 Difference]: Without dead ends: 214 [2020-09-04 17:45:01,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-09-04 17:45:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-04 17:45:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-09-04 17:45:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-09-04 17:45:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-09-04 17:45:01,537 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-09-04 17:45:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:01,537 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-09-04 17:45:01,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 17:45:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-09-04 17:45:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-04 17:45:01,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:01,539 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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] [2020-09-04 17:45:01,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 17:45:01,539 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash -607734095, now seen corresponding path program 26 times [2020-09-04 17:45:01,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:01,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238716052] [2020-09-04 17:45:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:01,545 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:01,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:01,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:06,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238716052] [2020-09-04 17:45:06,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:06,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-09-04 17:45:06,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625264598] [2020-09-04 17:45:06,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-04 17:45:06,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:06,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-04 17:45:06,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 17:45:06,474 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-09-04 17:45:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:11,601 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-09-04 17:45:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-04 17:45:11,602 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-09-04 17:45:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:11,604 INFO L225 Difference]: With dead ends: 257 [2020-09-04 17:45:11,604 INFO L226 Difference]: Without dead ends: 220 [2020-09-04 17:45:11,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-09-04 17:45:11,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-04 17:45:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-09-04 17:45:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-04 17:45:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-09-04 17:45:11,637 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-09-04 17:45:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:11,637 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-09-04 17:45:11,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-04 17:45:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-09-04 17:45:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-04 17:45:11,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:11,639 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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] [2020-09-04 17:45:11,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 17:45:11,639 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1597013933, now seen corresponding path program 27 times [2020-09-04 17:45:11,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:11,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537496839] [2020-09-04 17:45:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:11,650 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:11,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:11,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:16,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537496839] [2020-09-04 17:45:16,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:16,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-09-04 17:45:16,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78396989] [2020-09-04 17:45:16,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 17:45:16,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 17:45:16,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 17:45:16,868 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-09-04 17:45:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:22,400 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-09-04 17:45:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-09-04 17:45:22,401 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-09-04 17:45:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:22,402 INFO L225 Difference]: With dead ends: 263 [2020-09-04 17:45:22,402 INFO L226 Difference]: Without dead ends: 226 [2020-09-04 17:45:22,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-09-04 17:45:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-04 17:45:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-09-04 17:45:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 17:45:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-09-04 17:45:22,435 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-09-04 17:45:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:22,436 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-09-04 17:45:22,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 17:45:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-09-04 17:45:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 17:45:22,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:22,437 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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] [2020-09-04 17:45:22,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 17:45:22,438 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -523854935, now seen corresponding path program 28 times [2020-09-04 17:45:22,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:22,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933156176] [2020-09-04 17:45:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:22,448 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:22,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:28,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933156176] [2020-09-04 17:45:28,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:28,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-09-04 17:45:28,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613965561] [2020-09-04 17:45:28,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-04 17:45:28,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-04 17:45:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 17:45:28,064 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-09-04 17:45:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:34,037 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-09-04 17:45:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-09-04 17:45:34,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-09-04 17:45:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:34,040 INFO L225 Difference]: With dead ends: 269 [2020-09-04 17:45:34,040 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 17:45:34,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-09-04 17:45:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 17:45:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-09-04 17:45:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-09-04 17:45:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-09-04 17:45:34,065 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-09-04 17:45:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:34,065 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-09-04 17:45:34,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-04 17:45:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-09-04 17:45:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-04 17:45:34,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:34,067 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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] [2020-09-04 17:45:34,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 17:45:34,067 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1262564699, now seen corresponding path program 29 times [2020-09-04 17:45:34,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:34,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792128607] [2020-09-04 17:45:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:34,071 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792128607] [2020-09-04 17:45:40,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:40,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-09-04 17:45:40,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906691999] [2020-09-04 17:45:40,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 17:45:40,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:40,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 17:45:40,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 17:45:40,112 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-09-04 17:45:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:46,546 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-09-04 17:45:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-09-04 17:45:46,547 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-09-04 17:45:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:46,549 INFO L225 Difference]: With dead ends: 275 [2020-09-04 17:45:46,549 INFO L226 Difference]: Without dead ends: 238 [2020-09-04 17:45:46,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-09-04 17:45:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-04 17:45:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-09-04 17:45:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 17:45:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-09-04 17:45:46,576 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-09-04 17:45:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:46,576 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-09-04 17:45:46,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 17:45:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-09-04 17:45:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-04 17:45:46,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:46,578 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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] [2020-09-04 17:45:46,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 17:45:46,578 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 536792225, now seen corresponding path program 30 times [2020-09-04 17:45:46,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:46,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642536936] [2020-09-04 17:45:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:46,583 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:46,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:45:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:53,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642536936] [2020-09-04 17:45:53,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:53,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-09-04 17:45:53,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313931023] [2020-09-04 17:45:53,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-09-04 17:45:53,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-09-04 17:45:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 17:45:53,394 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-09-04 17:46:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:00,316 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-09-04 17:46:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-09-04 17:46:00,317 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-09-04 17:46:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:00,319 INFO L225 Difference]: With dead ends: 281 [2020-09-04 17:46:00,319 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 17:46:00,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-09-04 17:46:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 17:46:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-09-04 17:46:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 17:46:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-09-04 17:46:00,348 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-09-04 17:46:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:00,348 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-09-04 17:46:00,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-09-04 17:46:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-09-04 17:46:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 17:46:00,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:00,349 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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] [2020-09-04 17:46:00,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 17:46:00,349 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 337404317, now seen corresponding path program 31 times [2020-09-04 17:46:00,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:00,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644365956] [2020-09-04 17:46:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:00,357 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:00,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:07,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644365956] [2020-09-04 17:46:07,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:07,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-09-04 17:46:07,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984975213] [2020-09-04 17:46:07,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 17:46:07,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 17:46:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 17:46:07,627 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-09-04 17:46:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:15,088 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-09-04 17:46:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-09-04 17:46:15,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-09-04 17:46:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:15,091 INFO L225 Difference]: With dead ends: 287 [2020-09-04 17:46:15,091 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 17:46:15,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-09-04 17:46:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 17:46:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-09-04 17:46:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-04 17:46:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-09-04 17:46:15,122 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-09-04 17:46:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:15,122 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-09-04 17:46:15,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 17:46:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-09-04 17:46:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-04 17:46:15,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:15,124 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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] [2020-09-04 17:46:15,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 17:46:15,124 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -346207847, now seen corresponding path program 32 times [2020-09-04 17:46:15,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:15,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593007608] [2020-09-04 17:46:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:15,128 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:22,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593007608] [2020-09-04 17:46:22,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:22,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-09-04 17:46:22,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655117394] [2020-09-04 17:46:22,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-09-04 17:46:22,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-09-04 17:46:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 17:46:22,605 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-09-04 17:46:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:30,987 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-09-04 17:46:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-09-04 17:46:30,988 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-09-04 17:46:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:30,990 INFO L225 Difference]: With dead ends: 293 [2020-09-04 17:46:30,991 INFO L226 Difference]: Without dead ends: 256 [2020-09-04 17:46:30,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-09-04 17:46:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-04 17:46:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-09-04 17:46:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 17:46:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-09-04 17:46:31,030 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-09-04 17:46:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:31,030 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-09-04 17:46:31,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-09-04 17:46:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-09-04 17:46:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-04 17:46:31,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:31,032 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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] [2020-09-04 17:46:31,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 17:46:31,032 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 615990421, now seen corresponding path program 33 times [2020-09-04 17:46:31,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:31,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994945195] [2020-09-04 17:46:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:31,036 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:31,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:39,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994945195] [2020-09-04 17:46:39,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:39,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-09-04 17:46:39,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926656677] [2020-09-04 17:46:39,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-09-04 17:46:39,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-09-04 17:46:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 17:46:39,267 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-09-04 17:46:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:47,874 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-09-04 17:46:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-09-04 17:46:47,875 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-09-04 17:46:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:47,877 INFO L225 Difference]: With dead ends: 299 [2020-09-04 17:46:47,878 INFO L226 Difference]: Without dead ends: 262 [2020-09-04 17:46:47,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-09-04 17:46:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-04 17:46:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-09-04 17:46:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 17:46:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-09-04 17:46:47,925 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-09-04 17:46:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:47,925 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-09-04 17:46:47,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-09-04 17:46:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-09-04 17:46:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-04 17:46:47,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:47,928 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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] [2020-09-04 17:46:47,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 17:46:47,928 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 533729937, now seen corresponding path program 34 times [2020-09-04 17:46:47,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:47,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754122455] [2020-09-04 17:46:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:47,934 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:48,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:48,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:46:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:56,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754122455] [2020-09-04 17:46:56,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:56,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-09-04 17:46:56,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73381508] [2020-09-04 17:46:56,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-09-04 17:46:56,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-09-04 17:46:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 17:46:56,559 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-09-04 17:47:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:05,941 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-09-04 17:47:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-09-04 17:47:05,942 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-09-04 17:47:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:05,944 INFO L225 Difference]: With dead ends: 305 [2020-09-04 17:47:05,944 INFO L226 Difference]: Without dead ends: 268 [2020-09-04 17:47:05,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-09-04 17:47:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-09-04 17:47:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-09-04 17:47:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-04 17:47:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-09-04 17:47:05,998 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-09-04 17:47:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:05,999 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-09-04 17:47:05,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-09-04 17:47:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-09-04 17:47:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-09-04 17:47:06,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:06,001 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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] [2020-09-04 17:47:06,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 17:47:06,001 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -654478451, now seen corresponding path program 35 times [2020-09-04 17:47:06,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:06,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443891729] [2020-09-04 17:47:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:06,009 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:06,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:06,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443891729] [2020-09-04 17:47:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-09-04 17:47:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284308269] [2020-09-04 17:47:15,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-09-04 17:47:15,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-09-04 17:47:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 17:47:15,350 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-09-04 17:47:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:25,354 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-09-04 17:47:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-09-04 17:47:25,356 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-09-04 17:47:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:25,358 INFO L225 Difference]: With dead ends: 311 [2020-09-04 17:47:25,358 INFO L226 Difference]: Without dead ends: 274 [2020-09-04 17:47:25,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-09-04 17:47:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-04 17:47:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-09-04 17:47:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-04 17:47:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-09-04 17:47:25,412 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-09-04 17:47:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:25,412 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-09-04 17:47:25,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-09-04 17:47:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-09-04 17:47:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-04 17:47:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:25,415 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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] [2020-09-04 17:47:25,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 17:47:25,415 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1522194551, now seen corresponding path program 36 times [2020-09-04 17:47:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:25,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712521069] [2020-09-04 17:47:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:25,423 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:25,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:35,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712521069] [2020-09-04 17:47:35,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:35,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-09-04 17:47:35,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170460580] [2020-09-04 17:47:35,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-09-04 17:47:35,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:35,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-09-04 17:47:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 17:47:35,424 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-09-04 17:47:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:45,962 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-09-04 17:47:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-09-04 17:47:45,963 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-09-04 17:47:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:45,965 INFO L225 Difference]: With dead ends: 317 [2020-09-04 17:47:45,965 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 17:47:45,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-09-04 17:47:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 17:47:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-09-04 17:47:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-04 17:47:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-09-04 17:47:46,003 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-09-04 17:47:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:46,004 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-09-04 17:47:46,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-09-04 17:47:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-09-04 17:47:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-04 17:47:46,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:46,006 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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] [2020-09-04 17:47:46,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 17:47:46,006 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash -295899515, now seen corresponding path program 37 times [2020-09-04 17:47:46,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:46,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044788444] [2020-09-04 17:47:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:46,016 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:46,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:47:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:55,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044788444] [2020-09-04 17:47:55,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:55,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-09-04 17:47:55,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147253529] [2020-09-04 17:47:55,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-09-04 17:47:55,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-09-04 17:47:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 17:47:55,928 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-09-04 17:48:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:06,271 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-09-04 17:48:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-09-04 17:48:06,272 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-09-04 17:48:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:06,274 INFO L225 Difference]: With dead ends: 323 [2020-09-04 17:48:06,274 INFO L226 Difference]: Without dead ends: 286 [2020-09-04 17:48:06,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-09-04 17:48:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-04 17:48:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-09-04 17:48:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-04 17:48:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-09-04 17:48:06,320 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-09-04 17:48:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:06,320 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-09-04 17:48:06,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-09-04 17:48:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-09-04 17:48:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 17:48:06,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:06,323 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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] [2020-09-04 17:48:06,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 17:48:06,323 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash -290813823, now seen corresponding path program 38 times [2020-09-04 17:48:06,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:06,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850816330] [2020-09-04 17:48:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:06,333 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:06,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:06,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:48:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:16,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850816330] [2020-09-04 17:48:16,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:16,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-09-04 17:48:16,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420902966] [2020-09-04 17:48:16,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-09-04 17:48:16,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-09-04 17:48:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 17:48:16,917 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-09-04 17:48:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:28,622 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-09-04 17:48:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-09-04 17:48:28,623 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-09-04 17:48:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:28,625 INFO L225 Difference]: With dead ends: 329 [2020-09-04 17:48:28,625 INFO L226 Difference]: Without dead ends: 292 [2020-09-04 17:48:28,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-09-04 17:48:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-04 17:48:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-09-04 17:48:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-09-04 17:48:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-09-04 17:48:28,666 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-09-04 17:48:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:28,666 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-09-04 17:48:28,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-09-04 17:48:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-09-04 17:48:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-04 17:48:28,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:28,668 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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] [2020-09-04 17:48:28,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 17:48:28,669 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1833153917, now seen corresponding path program 39 times [2020-09-04 17:48:28,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:28,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111443620] [2020-09-04 17:48:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:28,681 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:28,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:28,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:48:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:40,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111443620] [2020-09-04 17:48:40,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:40,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-09-04 17:48:40,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674076395] [2020-09-04 17:48:40,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-09-04 17:48:40,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-09-04 17:48:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 17:48:40,197 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-09-04 17:48:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,612 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-09-04 17:48:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-09-04 17:48:53,614 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-09-04 17:48:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,615 INFO L225 Difference]: With dead ends: 335 [2020-09-04 17:48:53,615 INFO L226 Difference]: Without dead ends: 298 [2020-09-04 17:48:53,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-09-04 17:48:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-04 17:48:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-09-04 17:48:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 17:48:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-09-04 17:48:53,675 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-09-04 17:48:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:53,676 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-09-04 17:48:53,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-09-04 17:48:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-09-04 17:48:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-09-04 17:48:53,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:53,678 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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] [2020-09-04 17:48:53,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 17:48:53,678 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2045654393, now seen corresponding path program 40 times [2020-09-04 17:48:53,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:53,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329432286] [2020-09-04 17:48:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:53,689 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:53,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:48:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:07,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329432286] [2020-09-04 17:49:07,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:07,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-09-04 17:49:07,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636542094] [2020-09-04 17:49:07,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-09-04 17:49:07,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-09-04 17:49:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 17:49:07,483 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-09-04 17:49:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:23,647 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-09-04 17:49:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-04 17:49:23,649 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-09-04 17:49:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:23,651 INFO L225 Difference]: With dead ends: 341 [2020-09-04 17:49:23,651 INFO L226 Difference]: Without dead ends: 304 [2020-09-04 17:49:23,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-09-04 17:49:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-04 17:49:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-09-04 17:49:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-09-04 17:49:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-09-04 17:49:23,715 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-09-04 17:49:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:23,716 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-09-04 17:49:23,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-09-04 17:49:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-09-04 17:49:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-04 17:49:23,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:23,718 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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] [2020-09-04 17:49:23,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 17:49:23,718 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 689948789, now seen corresponding path program 41 times [2020-09-04 17:49:23,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:23,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038229568] [2020-09-04 17:49:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:23,730 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:23,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:23,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:49:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:38,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038229568] [2020-09-04 17:49:38,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:38,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-09-04 17:49:38,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212557292] [2020-09-04 17:49:38,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-09-04 17:49:38,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:38,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-09-04 17:49:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 17:49:38,776 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-09-04 17:49:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:56,212 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-09-04 17:49:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-09-04 17:49:56,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-09-04 17:49:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:56,216 INFO L225 Difference]: With dead ends: 347 [2020-09-04 17:49:56,216 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 17:49:56,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-09-04 17:49:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 17:49:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-09-04 17:49:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-04 17:49:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-09-04 17:49:56,281 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-09-04 17:49:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:56,282 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-09-04 17:49:56,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-09-04 17:49:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-09-04 17:49:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-09-04 17:49:56,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:56,284 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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] [2020-09-04 17:49:56,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 17:49:56,284 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1342058097, now seen corresponding path program 42 times [2020-09-04 17:49:56,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:56,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735687061] [2020-09-04 17:49:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:56,294 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:56,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:49:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:13,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735687061] [2020-09-04 17:50:13,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-09-04 17:50:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001067475] [2020-09-04 17:50:13,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-09-04 17:50:13,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-09-04 17:50:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 17:50:13,054 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-09-04 17:50:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:31,228 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-09-04 17:50:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-09-04 17:50:31,230 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-09-04 17:50:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:31,232 INFO L225 Difference]: With dead ends: 353 [2020-09-04 17:50:31,232 INFO L226 Difference]: Without dead ends: 316 [2020-09-04 17:50:31,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-09-04 17:50:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-09-04 17:50:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-09-04 17:50:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 17:50:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-09-04 17:50:31,299 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-09-04 17:50:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:31,300 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-09-04 17:50:31,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-09-04 17:50:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-09-04 17:50:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 17:50:31,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:31,302 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 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] [2020-09-04 17:50:31,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 17:50:31,302 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1079977837, now seen corresponding path program 43 times [2020-09-04 17:50:31,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:31,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685351572] [2020-09-04 17:50:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:31,310 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:31,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:31,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:50:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:49,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685351572] [2020-09-04 17:50:49,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:49,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-09-04 17:50:49,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725668610] [2020-09-04 17:50:49,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-09-04 17:50:49,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-09-04 17:50:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 17:50:49,819 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-09-04 17:51:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:10,987 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-09-04 17:51:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-09-04 17:51:10,990 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-09-04 17:51:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:10,992 INFO L225 Difference]: With dead ends: 359 [2020-09-04 17:51:10,992 INFO L226 Difference]: Without dead ends: 322 [2020-09-04 17:51:10,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-09-04 17:51:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-04 17:51:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-09-04 17:51:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-04 17:51:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-09-04 17:51:11,081 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-09-04 17:51:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:11,082 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-09-04 17:51:11,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-09-04 17:51:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-09-04 17:51:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-09-04 17:51:11,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:11,084 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 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] [2020-09-04 17:51:11,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 17:51:11,084 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2067238039, now seen corresponding path program 44 times [2020-09-04 17:51:11,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:11,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181367721] [2020-09-04 17:51:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:11,097 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:11,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:11,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:51:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:51:31,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181367721] [2020-09-04 17:51:31,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:51:31,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-09-04 17:51:31,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445038696] [2020-09-04 17:51:31,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-09-04 17:51:31,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:51:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-09-04 17:51:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 17:51:31,400 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-09-04 17:51:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:53,921 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-09-04 17:51:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-09-04 17:51:53,924 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-09-04 17:51:53,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:53,926 INFO L225 Difference]: With dead ends: 365 [2020-09-04 17:51:53,926 INFO L226 Difference]: Without dead ends: 328 [2020-09-04 17:51:53,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-09-04 17:51:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-04 17:51:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-09-04 17:51:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-04 17:51:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-09-04 17:51:53,985 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-09-04 17:51:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:53,985 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-09-04 17:51:53,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-09-04 17:51:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-09-04 17:51:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-09-04 17:51:53,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:53,987 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 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] [2020-09-04 17:51:53,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 17:51:53,988 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1670393243, now seen corresponding path program 45 times [2020-09-04 17:51:53,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:53,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564435411] [2020-09-04 17:51:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:54,001 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:54,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:54,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:51:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:52:17,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564435411] [2020-09-04 17:52:17,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:17,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-09-04 17:52:17,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419147620] [2020-09-04 17:52:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-09-04 17:52:17,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-09-04 17:52:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 17:52:17,796 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-09-04 17:52:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:52:40,672 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-09-04 17:52:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-09-04 17:52:40,675 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-09-04 17:52:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:52:40,677 INFO L225 Difference]: With dead ends: 371 [2020-09-04 17:52:40,677 INFO L226 Difference]: Without dead ends: 334 [2020-09-04 17:52:40,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-09-04 17:52:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-04 17:52:40,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-09-04 17:52:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 17:52:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-09-04 17:52:40,727 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-09-04 17:52:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:52:40,727 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-09-04 17:52:40,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-09-04 17:52:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-09-04 17:52:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-04 17:52:40,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:52:40,729 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 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] [2020-09-04 17:52:40,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 17:52:40,729 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:52:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:52:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1220869023, now seen corresponding path program 46 times [2020-09-04 17:52:40,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:52:40,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996044452] [2020-09-04 17:52:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:52:40,734 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:52:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:40,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:52:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:40,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:52:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:53:07,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996044452] [2020-09-04 17:53:07,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:53:07,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-09-04 17:53:07,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56724616] [2020-09-04 17:53:07,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-09-04 17:53:07,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:53:07,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-09-04 17:53:07,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 17:53:07,709 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-09-04 17:53:23,804 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-09-04 17:53:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:53:40,004 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-09-04 17:53:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-09-04 17:53:40,008 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-09-04 17:53:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:53:40,010 INFO L225 Difference]: With dead ends: 377 [2020-09-04 17:53:40,011 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 17:53:40,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-09-04 17:53:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 17:53:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-09-04 17:53:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-09-04 17:53:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-09-04 17:53:40,065 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-09-04 17:53:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:53:40,065 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-09-04 17:53:40,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-09-04 17:53:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-09-04 17:53:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-09-04 17:53:40,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:53:40,067 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 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] [2020-09-04 17:53:40,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 17:53:40,067 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:53:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:53:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1908394333, now seen corresponding path program 47 times [2020-09-04 17:53:40,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:53:40,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415833147] [2020-09-04 17:53:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:53:40,076 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:53:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:53:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:40,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:53:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:41,040 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,189 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,342 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,496 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,668 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:53:41,835 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:54:08,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415833147] [2020-09-04 17:54:08,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:54:08,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-09-04 17:54:08,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718096600] [2020-09-04 17:54:08,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-09-04 17:54:08,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:54:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-09-04 17:54:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 17:54:08,595 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 101 states. [2020-09-04 17:54:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:54:43,382 INFO L93 Difference]: Finished difference Result 383 states and 393 transitions. [2020-09-04 17:54:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-09-04 17:54:43,386 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 325 [2020-09-04 17:54:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:54:43,389 INFO L225 Difference]: With dead ends: 383 [2020-09-04 17:54:43,389 INFO L226 Difference]: Without dead ends: 346 [2020-09-04 17:54:43,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-09-04 17:54:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-04 17:54:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-09-04 17:54:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-09-04 17:54:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-09-04 17:54:43,489 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-09-04 17:54:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:54:43,490 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-09-04 17:54:43,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-09-04 17:54:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-09-04 17:54:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-09-04 17:54:43,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:54:43,493 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 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] [2020-09-04 17:54:43,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 17:54:43,494 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:54:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:54:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1857822375, now seen corresponding path program 48 times [2020-09-04 17:54:43,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:54:43,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015409964] [2020-09-04 17:54:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:54:43,503 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:54:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:43,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:54:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:43,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:54:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:44,351 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:44,500 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:44,662 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:44,826 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:44,998 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:45,180 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:45,369 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:45,556 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:45,731 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:45,926 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:46,131 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:46,330 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:46,538 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:46,743 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:47,582 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:47,839 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:48,099 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:48,378 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:48,637 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:48,898 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:49,164 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:49,434 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:49,709 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:49,990 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:50,270 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:50,559 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,128 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:51,717 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,562 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:52,905 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,568 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:53,900 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,241 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,608 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:54,991 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:54:59,667 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:08,736 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:55:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:55:18,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015409964] [2020-09-04 17:55:18,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:18,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-09-04 17:55:18,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544433078] [2020-09-04 17:55:18,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-09-04 17:55:18,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-09-04 17:55:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2604, Invalid=7902, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 17:55:18,475 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 103 states. [2020-09-04 17:55:47,277 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-09-04 17:56:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:00,566 INFO L93 Difference]: Finished difference Result 389 states and 399 transitions. [2020-09-04 17:56:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2020-09-04 17:56:00,570 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 331 [2020-09-04 17:56:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:00,572 INFO L225 Difference]: With dead ends: 389 [2020-09-04 17:56:00,573 INFO L226 Difference]: Without dead ends: 352 [2020-09-04 17:56:00,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7491 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=12467, Invalid=28539, Unknown=0, NotChecked=0, Total=41006 [2020-09-04 17:56:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-09-04 17:56:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-09-04 17:56:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-09-04 17:56:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-09-04 17:56:00,632 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-09-04 17:56:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:00,633 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-09-04 17:56:00,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-09-04 17:56:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-09-04 17:56:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-09-04 17:56:00,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:00,635 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 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] [2020-09-04 17:56:00,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 17:56:00,635 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1078129579, now seen corresponding path program 49 times [2020-09-04 17:56:00,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:00,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147294919] [2020-09-04 17:56:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:00,642 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:00,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:56:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:01,474 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:01,656 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:01,844 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:02,037 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:02,238 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:02,441 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:02,654 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:02,874 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:03,098 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:03,332 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:03,572 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:03,816 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:04,074 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:04,329 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:04,595 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:04,842 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:05,107 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:05,378 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:05,661 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:05,906 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:06,184 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:06,496 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:06,819 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:07,142 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:07,466 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:07,800 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:08,118 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:08,445 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:08,795 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:09,138 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:09,477 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:09,804 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 17:56:10,151 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12