/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/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:01,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:01,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:01,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:50:01,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:01,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:01,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:01,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:01,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:01,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:01,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:01,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:01,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:01,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:01,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:01,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:01,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:01,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:01,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:01,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:01,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:50:01,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:01,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:01,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:01,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:01,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:01,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:01,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:01,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:01,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:01,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:01,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:01,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:01,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:01,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:01,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:01,842 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:01,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:01,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:01,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:01,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:01,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:01,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:01,843 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:02,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:02,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:02,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:02,137 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:02,138 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:02,138 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-08-22 19:50:02,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b05dd3da/f881cd8e00bf47008c145a06e8d508ac/FLAG710ea2733 [2020-08-22 19:50:02,654 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:02,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-08-22 19:50:02,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b05dd3da/f881cd8e00bf47008c145a06e8d508ac/FLAG710ea2733 [2020-08-22 19:50:03,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b05dd3da/f881cd8e00bf47008c145a06e8d508ac [2020-08-22 19:50:03,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:03,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:03,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:03,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:03,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:03,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c70a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03, skipping insertion in model container [2020-08-22 19:50:03,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:03,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:03,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:03,282 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:03,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:03,317 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:03,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03 WrapperNode [2020-08-22 19:50:03,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:03,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:03,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:03,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:03,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... [2020-08-22 19:50:03,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:03,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:03,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:03,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:03,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:03,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:03,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:03,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:50:03,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:03,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:03,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:03,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:03,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:03,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:03,790 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:03,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:03 BoogieIcfgContainer [2020-08-22 19:50:03,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:03,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:03,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:03,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:03,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:03" (1/3) ... [2020-08-22 19:50:03,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8272225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:03, skipping insertion in model container [2020-08-22 19:50:03,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:03" (2/3) ... [2020-08-22 19:50:03,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8272225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:03, skipping insertion in model container [2020-08-22 19:50:03,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:03" (3/3) ... [2020-08-22 19:50:03,804 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt3.c [2020-08-22 19:50:03,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:03,825 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:03,864 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:03,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:03,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:03,933 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:03,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:03,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:03,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:03,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:03,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 19:50:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 19:50:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:03,968 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] [2020-08-22 19:50:03,968 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1514708489, now seen corresponding path program 1 times [2020-08-22 19:50:03,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:03,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918554050] [2020-08-22 19:50:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:04,039 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:04,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:04,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918554050] [2020-08-22 19:50:04,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:04,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:50:04,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110997642] [2020-08-22 19:50:04,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:50:04,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:50:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:50:04,675 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 10 states. [2020-08-22 19:50:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:05,181 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-08-22 19:50:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:50:05,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-08-22 19:50:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:05,194 INFO L225 Difference]: With dead ends: 68 [2020-08-22 19:50:05,194 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 19:50:05,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:50:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 19:50:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 19:50:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 19:50:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 19:50:05,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-08-22 19:50:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:05,247 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 19:50:05,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:50:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 19:50:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:50:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:05,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:05,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:05,250 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash 993233083, now seen corresponding path program 1 times [2020-08-22 19:50:05,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:05,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925638935] [2020-08-22 19:50:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:05,274 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:05,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:06,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925638935] [2020-08-22 19:50:06,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:06,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:50:06,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359796711] [2020-08-22 19:50:06,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:50:06,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:50:06,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:50:06,016 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-08-22 19:50:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:06,743 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-22 19:50:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:50:06,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-08-22 19:50:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:06,746 INFO L225 Difference]: With dead ends: 45 [2020-08-22 19:50:06,746 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 19:50:06,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:50:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 19:50:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-08-22 19:50:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 19:50:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-08-22 19:50:06,760 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-08-22 19:50:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:06,761 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-08-22 19:50:06,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:50:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-08-22 19:50:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:50:06,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:06,763 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 19:50:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:06,763 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2107258259, now seen corresponding path program 2 times [2020-08-22 19:50:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387711741] [2020-08-22 19:50:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:06,771 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:06,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:06,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387711741] [2020-08-22 19:50:06,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:06,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:50:06,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842103148] [2020-08-22 19:50:06,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:50:06,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:50:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:50:07,000 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-08-22 19:50:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:09,411 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-08-22 19:50:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:50:09,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-22 19:50:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:09,414 INFO L225 Difference]: With dead ends: 61 [2020-08-22 19:50:09,414 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 19:50:09,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 19:50:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-08-22 19:50:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 19:50:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 19:50:09,428 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-22 19:50:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:09,428 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 19:50:09,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:50:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 19:50:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:50:09,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:09,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:09,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:09,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:09,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1595204474, now seen corresponding path program 1 times [2020-08-22 19:50:09,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:09,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003065170] [2020-08-22 19:50:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:09,438 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:09,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:09,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003065170] [2020-08-22 19:50:09,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:09,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:50:09,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878407407] [2020-08-22 19:50:09,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:50:09,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:09,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:50:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:50:09,509 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-08-22 19:50:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:09,621 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-08-22 19:50:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:50:09,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-08-22 19:50:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:09,624 INFO L225 Difference]: With dead ends: 51 [2020-08-22 19:50:09,625 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 19:50:09,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:50:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 19:50:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 19:50:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 19:50:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-08-22 19:50:09,645 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-08-22 19:50:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:09,646 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-08-22 19:50:09,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:50:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-08-22 19:50:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:50:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:09,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:09,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:50:09,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2000770278, now seen corresponding path program 1 times [2020-08-22 19:50:09,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:09,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938397868] [2020-08-22 19:50:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:09,658 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:10,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:10,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938397868] [2020-08-22 19:50:10,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:10,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:50:10,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230218152] [2020-08-22 19:50:10,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:50:10,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:50:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:50:10,464 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-08-22 19:50:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:11,375 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-08-22 19:50:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:50:11,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-08-22 19:50:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:11,377 INFO L225 Difference]: With dead ends: 50 [2020-08-22 19:50:11,379 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 19:50:11,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:50:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 19:50:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-08-22 19:50:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 19:50:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-08-22 19:50:11,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-08-22 19:50:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:11,401 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-08-22 19:50:11,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:50:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-08-22 19:50:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:50:11,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:11,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-22 19:50:11,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:50:11,404 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash 755730712, now seen corresponding path program 2 times [2020-08-22 19:50:11,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:11,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503464203] [2020-08-22 19:50:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:11,414 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:11,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503464203] [2020-08-22 19:50:11,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:11,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:50:11,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162392304] [2020-08-22 19:50:11,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:50:11,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:50:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:50:11,835 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-08-22 19:50:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:12,455 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-08-22 19:50:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:50:12,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-08-22 19:50:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:12,457 INFO L225 Difference]: With dead ends: 57 [2020-08-22 19:50:12,458 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 19:50:12,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 19:50:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-08-22 19:50:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 19:50:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-22 19:50:12,472 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-08-22 19:50:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:12,472 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-22 19:50:12,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:50:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-22 19:50:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 19:50:12,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:12,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-22 19:50:12,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:50:12,474 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1258107707, now seen corresponding path program 1 times [2020-08-22 19:50:12,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:12,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676371238] [2020-08-22 19:50:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:12,485 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:13,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:13,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676371238] [2020-08-22 19:50:13,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:13,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 19:50:13,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453470556] [2020-08-22 19:50:13,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 19:50:13,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 19:50:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:50:13,399 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2020-08-22 19:50:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:14,415 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-08-22 19:50:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:50:14,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-08-22 19:50:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:14,417 INFO L225 Difference]: With dead ends: 65 [2020-08-22 19:50:14,417 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 19:50:14,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:50:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 19:50:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-08-22 19:50:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:50:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-22 19:50:14,432 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-08-22 19:50:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:14,433 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-22 19:50:14,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 19:50:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-22 19:50:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:50:14,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:14,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:14,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:50:14,435 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash -397003539, now seen corresponding path program 2 times [2020-08-22 19:50:14,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:14,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445479113] [2020-08-22 19:50:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:14,444 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:15,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:15,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445479113] [2020-08-22 19:50:15,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:15,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 19:50:15,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010138529] [2020-08-22 19:50:15,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 19:50:15,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 19:50:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:50:15,365 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-22 19:50:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:18,586 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 19:50:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 19:50:18,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-08-22 19:50:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:18,588 INFO L225 Difference]: With dead ends: 69 [2020-08-22 19:50:18,588 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 19:50:18,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:50:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 19:50:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-08-22 19:50:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 19:50:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-08-22 19:50:18,605 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-08-22 19:50:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:18,606 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-08-22 19:50:18,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 19:50:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-08-22 19:50:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 19:50:18,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:18,607 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:18,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:50:18,607 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1225985439, now seen corresponding path program 3 times [2020-08-22 19:50:18,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:18,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418527627] [2020-08-22 19:50:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:18,614 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:19,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:19,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418527627] [2020-08-22 19:50:19,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:19,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:50:19,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671091023] [2020-08-22 19:50:19,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:50:19,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:50:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:50:19,230 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 13 states. [2020-08-22 19:50:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:20,077 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-08-22 19:50:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:50:20,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-08-22 19:50:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:20,079 INFO L225 Difference]: With dead ends: 66 [2020-08-22 19:50:20,079 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 19:50:20,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:50:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 19:50:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-22 19:50:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 19:50:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-08-22 19:50:20,098 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-08-22 19:50:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:20,098 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-08-22 19:50:20,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:50:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-08-22 19:50:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:50:20,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:20,099 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2020-08-22 19:50:20,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:50:20,100 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1343864940, now seen corresponding path program 4 times [2020-08-22 19:50:20,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:20,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860696805] [2020-08-22 19:50:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:20,106 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:21,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:21,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860696805] [2020-08-22 19:50:21,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:21,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 19:50:21,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186282492] [2020-08-22 19:50:21,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 19:50:21,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 19:50:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:50:21,275 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2020-08-22 19:50:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:22,781 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-08-22 19:50:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:50:22,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-08-22 19:50:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:22,783 INFO L225 Difference]: With dead ends: 74 [2020-08-22 19:50:22,783 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:50:22,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:50:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:50:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-08-22 19:50:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 19:50:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-22 19:50:22,803 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2020-08-22 19:50:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:22,804 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-22 19:50:22,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 19:50:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-22 19:50:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 19:50:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:22,805 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2020-08-22 19:50:22,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:50:22,805 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1589603526, now seen corresponding path program 5 times [2020-08-22 19:50:22,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:22,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948138132] [2020-08-22 19:50:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:22,811 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:23,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:23,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948138132] [2020-08-22 19:50:23,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:23,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:50:23,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966070833] [2020-08-22 19:50:23,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:50:23,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:50:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:50:23,346 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-08-22 19:50:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,392 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-08-22 19:50:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:50:24,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-08-22 19:50:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,394 INFO L225 Difference]: With dead ends: 71 [2020-08-22 19:50:24,394 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:50:24,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:50:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:50:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-08-22 19:50:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 19:50:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-08-22 19:50:24,412 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-08-22 19:50:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,413 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-08-22 19:50:24,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:50:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-08-22 19:50:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:50:24,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,414 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2020-08-22 19:50:24,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:50:24,415 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1338361165, now seen corresponding path program 6 times [2020-08-22 19:50:24,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290549180] [2020-08-22 19:50:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,422 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:24,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290549180] [2020-08-22 19:50:24,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:24,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:50:24,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244543532] [2020-08-22 19:50:24,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:50:24,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:24,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:50:24,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:50:24,571 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 9 states. [2020-08-22 19:50:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,922 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-08-22 19:50:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:50:24,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-22 19:50:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,924 INFO L225 Difference]: With dead ends: 70 [2020-08-22 19:50:24,924 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 19:50:24,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:50:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 19:50:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-08-22 19:50:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 19:50:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-08-22 19:50:24,946 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-08-22 19:50:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,947 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-08-22 19:50:24,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:50:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-08-22 19:50:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:50:24,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,948 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 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] [2020-08-22 19:50:24,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:50:24,949 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 639368621, now seen corresponding path program 7 times [2020-08-22 19:50:24,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500121210] [2020-08-22 19:50:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,957 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:26,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500121210] [2020-08-22 19:50:26,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:26,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 19:50:26,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333718138] [2020-08-22 19:50:26,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 19:50:26,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 19:50:26,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:50:26,333 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 25 states. [2020-08-22 19:50:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:28,030 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-08-22 19:50:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 19:50:28,031 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-08-22 19:50:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:28,032 INFO L225 Difference]: With dead ends: 69 [2020-08-22 19:50:28,032 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 19:50:28,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:50:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 19:50:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-08-22 19:50:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:50:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-08-22 19:50:28,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2020-08-22 19:50:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:28,050 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-08-22 19:50:28,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 19:50:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-08-22 19:50:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 19:50:28,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:28,051 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 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] [2020-08-22 19:50:28,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:50:28,052 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 692483679, now seen corresponding path program 8 times [2020-08-22 19:50:28,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:28,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148062044] [2020-08-22 19:50:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:28,059 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:29,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148062044] [2020-08-22 19:50:29,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:29,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 19:50:29,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678425694] [2020-08-22 19:50:29,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 19:50:29,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 19:50:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:50:29,602 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 27 states. [2020-08-22 19:50:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:31,672 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-08-22 19:50:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 19:50:31,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-08-22 19:50:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:31,674 INFO L225 Difference]: With dead ends: 83 [2020-08-22 19:50:31,675 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 19:50:31,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=264, Invalid=2088, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:50:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 19:50:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-08-22 19:50:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 19:50:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-22 19:50:31,697 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 55 [2020-08-22 19:50:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:31,697 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-22 19:50:31,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 19:50:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-22 19:50:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 19:50:31,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:31,698 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 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] [2020-08-22 19:50:31,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:50:31,699 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 742475281, now seen corresponding path program 9 times [2020-08-22 19:50:31,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:31,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022308442] [2020-08-22 19:50:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:31,707 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:34,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022308442] [2020-08-22 19:50:34,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:34,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:50:34,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029509667] [2020-08-22 19:50:34,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:50:34,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:34,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:50:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=207, Unknown=1, NotChecked=0, Total=240 [2020-08-22 19:50:34,576 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 16 states. [2020-08-22 19:50:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:38,417 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-22 19:50:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:50:38,418 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-08-22 19:50:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:38,419 INFO L225 Difference]: With dead ends: 80 [2020-08-22 19:50:38,420 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 19:50:38,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=102, Invalid=547, Unknown=1, NotChecked=0, Total=650 [2020-08-22 19:50:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 19:50:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-08-22 19:50:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 19:50:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-08-22 19:50:38,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-08-22 19:50:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:38,445 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-08-22 19:50:38,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:50:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-08-22 19:50:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:50:38,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:38,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 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] [2020-08-22 19:50:38,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:50:38,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 847189346, now seen corresponding path program 10 times [2020-08-22 19:50:38,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:38,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57916592] [2020-08-22 19:50:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:38,453 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:38,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57916592] [2020-08-22 19:50:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:50:38,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868914415] [2020-08-22 19:50:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:50:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:50:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:38,656 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 11 states. [2020-08-22 19:50:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:39,241 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-08-22 19:50:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:50:39,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 19:50:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:39,243 INFO L225 Difference]: With dead ends: 79 [2020-08-22 19:50:39,243 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 19:50:39,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:50:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 19:50:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 19:50:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 19:50:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-08-22 19:50:39,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2020-08-22 19:50:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:39,266 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-08-22 19:50:39,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:50:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-08-22 19:50:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:50:39,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:39,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 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] [2020-08-22 19:50:39,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:50:39,267 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash 148196802, now seen corresponding path program 11 times [2020-08-22 19:50:39,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:39,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248926152] [2020-08-22 19:50:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:39,275 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:41,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248926152] [2020-08-22 19:50:41,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:41,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-08-22 19:50:41,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144118934] [2020-08-22 19:50:41,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 19:50:41,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 19:50:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:50:41,029 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 29 states. [2020-08-22 19:50:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:43,647 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-08-22 19:50:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:50:43,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-08-22 19:50:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:43,649 INFO L225 Difference]: With dead ends: 78 [2020-08-22 19:50:43,650 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 19:50:43,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:50:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 19:50:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-08-22 19:50:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 19:50:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-08-22 19:50:43,668 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2020-08-22 19:50:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:43,668 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-08-22 19:50:43,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 19:50:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-08-22 19:50:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 19:50:43,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:43,669 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 3, 3, 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] [2020-08-22 19:50:43,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:50:43,669 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028724, now seen corresponding path program 12 times [2020-08-22 19:50:43,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:43,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531855330] [2020-08-22 19:50:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:43,676 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:55,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:55,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531855330] [2020-08-22 19:50:55,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:55,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:50:55,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203731401] [2020-08-22 19:50:55,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:50:55,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:50:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=192, Unknown=5, NotChecked=0, Total=240 [2020-08-22 19:50:55,105 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2020-08-22 19:51:37,597 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 42 [2020-08-22 19:52:06,611 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 42 [2020-08-22 19:52:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:55,590 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-22 19:52:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:52:55,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-08-22 19:52:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:55,592 INFO L225 Difference]: With dead ends: 82 [2020-08-22 19:52:55,592 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 19:52:55,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=166, Invalid=789, Unknown=37, NotChecked=0, Total=992 [2020-08-22 19:52:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 19:52:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 19:52:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:52:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 19:52:55,614 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-08-22 19:52:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:55,614 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 19:52:55,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:52:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 19:52:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 19:52:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:55,615 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:55,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:52:55,615 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1720607711, now seen corresponding path program 13 times [2020-08-22 19:52:55,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:55,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346368330] [2020-08-22 19:52:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:55,622 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:58,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346368330] [2020-08-22 19:52:58,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:58,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-08-22 19:52:58,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738504504] [2020-08-22 19:52:58,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 19:52:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 19:52:58,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:52:58,100 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 31 states. [2020-08-22 19:53:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:01,835 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-08-22 19:53:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 19:53:01,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-08-22 19:53:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:01,838 INFO L225 Difference]: With dead ends: 93 [2020-08-22 19:53:01,839 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 19:53:01,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:53:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 19:53:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-08-22 19:53:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 19:53:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-08-22 19:53:01,869 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2020-08-22 19:53:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:01,870 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-08-22 19:53:01,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 19:53:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-08-22 19:53:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 19:53:01,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:01,871 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:01,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:53:01,871 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2133429359, now seen corresponding path program 14 times [2020-08-22 19:53:01,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:01,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210149386] [2020-08-22 19:53:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:01,883 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:04,755 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-08-22 19:53:05,023 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-08-22 19:53:05,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210149386] [2020-08-22 19:53:05,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:05,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-08-22 19:53:05,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579875818] [2020-08-22 19:53:05,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 19:53:05,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 19:53:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:53:05,403 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 33 states. [2020-08-22 19:53:09,566 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-08-22 19:53:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:10,533 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-08-22 19:53:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 19:53:10,534 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2020-08-22 19:53:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:10,535 INFO L225 Difference]: With dead ends: 97 [2020-08-22 19:53:10,535 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 19:53:10,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=333, Invalid=3327, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:53:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 19:53:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-08-22 19:53:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 19:53:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-08-22 19:53:10,559 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2020-08-22 19:53:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:10,560 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-08-22 19:53:10,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 19:53:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-08-22 19:53:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 19:53:10,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:10,560 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:10,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:53:10,561 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 340482627, now seen corresponding path program 15 times [2020-08-22 19:53:10,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:10,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045070036] [2020-08-22 19:53:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:10,567 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:53,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045070036] [2020-08-22 19:53:53,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:53,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:53:53,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533346167] [2020-08-22 19:53:53,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:53:53,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:53:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=239, Unknown=20, NotChecked=0, Total=306 [2020-08-22 19:53:53,981 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 18 states. [2020-08-22 19:53:57,252 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-08-22 19:54:10,053 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0)))) (and (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 25769803776 .cse0) (* 36893488151714070528 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) c_main_~n~0 (* 36893488151714070528 .cse2) 8569934601)))) .cse3) (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) .cse3) (= c_~SIZE~0 |c_old(~SIZE~0)|))) is different from false [2020-08-22 19:54:49,421 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 40 [2020-08-22 19:55:41,846 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-08-22 19:56:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:52,391 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2020-08-22 19:56:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:56:52,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-08-22 19:56:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:52,394 INFO L225 Difference]: With dead ends: 103 [2020-08-22 19:56:52,395 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 19:56:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 122.3s TimeCoverageRelationStatistics Valid=194, Invalid=1092, Unknown=50, NotChecked=70, Total=1406 [2020-08-22 19:56:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 19:56:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-08-22 19:56:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 19:56:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 19:56:52,427 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-08-22 19:56:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:52,428 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 19:56:52,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:56:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 19:56:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 19:56:52,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:52,429 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:56:52,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:56:52,429 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1270318960, now seen corresponding path program 16 times [2020-08-22 19:56:52,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:52,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153583224] [2020-08-22 19:56:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:52,444 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:59,416 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-08-22 19:57:01,995 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-08-22 19:57:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:03,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153583224] [2020-08-22 19:57:03,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:03,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-08-22 19:57:03,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497501451] [2020-08-22 19:57:03,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 19:57:03,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 19:57:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:57:03,420 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 35 states. [2020-08-22 19:57:10,885 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 47 [2020-08-22 19:57:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:12,086 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-08-22 19:57:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 19:57:12,089 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-08-22 19:57:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:12,090 INFO L225 Difference]: With dead ends: 102 [2020-08-22 19:57:12,090 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 19:57:12,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=356, Invalid=3804, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:57:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 19:57:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-22 19:57:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 19:57:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-08-22 19:57:12,116 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 74 [2020-08-22 19:57:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:12,117 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-08-22 19:57:12,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 19:57:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-08-22 19:57:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 19:57:12,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:12,118 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:57:12,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:57:12,118 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:12,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1632541022, now seen corresponding path program 17 times [2020-08-22 19:57:12,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:12,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532395013] [2020-08-22 19:57:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:12,125 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:18,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:58:18,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532395013] [2020-08-22 19:58:18,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:18,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:58:18,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229603446] [2020-08-22 19:58:18,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 19:58:18,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 19:58:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=256, Unknown=31, NotChecked=0, Total=342 [2020-08-22 19:58:18,783 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-08-22 19:58:51,219 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0))) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 6 .cse0) (* 8589934593 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) (* 8589934592 .cse2) 1)))) (* 2 c_main_~l~0))) is different from false [2020-08-22 20:02:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:05,768 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-08-22 20:02:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 20:02:05,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-08-22 20:02:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:05,771 INFO L225 Difference]: With dead ends: 102 [2020-08-22 20:02:05,771 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 20:02:05,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 172.2s TimeCoverageRelationStatistics Valid=215, Invalid=1194, Unknown=77, NotChecked=74, Total=1560 [2020-08-22 20:02:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 20:02:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-22 20:02:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 20:02:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-08-22 20:02:05,798 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-08-22 20:02:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:05,798 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-08-22 20:02:05,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 20:02:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-08-22 20:02:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 20:02:05,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:05,799 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:05,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 20:02:05,799 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 236127985, now seen corresponding path program 18 times [2020-08-22 20:02:05,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:05,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156659554] [2020-08-22 20:02:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:05,808 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:06,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:02:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:02:06,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156659554] [2020-08-22 20:02:06,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:02:06,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 20:02:06,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288288354] [2020-08-22 20:02:06,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 20:02:06,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:02:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 20:02:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 20:02:06,120 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 15 states. [2020-08-22 20:02:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:07,273 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-08-22 20:02:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 20:02:07,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-08-22 20:02:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:07,275 INFO L225 Difference]: With dead ends: 98 [2020-08-22 20:02:07,275 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 20:02:07,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-22 20:02:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 20:02:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-08-22 20:02:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 20:02:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-22 20:02:07,301 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-08-22 20:02:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:07,301 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-22 20:02:07,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 20:02:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-22 20:02:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 20:02:07,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:07,302 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:07,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 20:02:07,302 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -462864559, now seen corresponding path program 19 times [2020-08-22 20:02:07,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:07,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848812544] [2020-08-22 20:02:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:07,308 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:10,439 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-08-22 20:02:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:02:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:02:11,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848812544] [2020-08-22 20:02:11,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:02:11,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-08-22 20:02:11,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580071427] [2020-08-22 20:02:11,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 20:02:11,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:02:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 20:02:11,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 20:02:11,094 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 37 states. [2020-08-22 20:02:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:16,849 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-08-22 20:02:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 20:02:16,850 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-08-22 20:02:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:16,851 INFO L225 Difference]: With dead ends: 97 [2020-08-22 20:02:16,852 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 20:02:16,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 20:02:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 20:02:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-08-22 20:02:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 20:02:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 20:02:16,880 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 79 [2020-08-22 20:02:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:16,880 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 20:02:16,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 20:02:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 20:02:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 20:02:16,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:16,881 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:16,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 20:02:16,881 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1777187325, now seen corresponding path program 20 times [2020-08-22 20:02:16,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:16,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549602858] [2020-08-22 20:02:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:16,888 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:21,070 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-08-22 20:02:21,392 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-08-22 20:02:21,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:02:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:02:21,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549602858] [2020-08-22 20:02:21,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:02:21,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-08-22 20:02:21,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040566306] [2020-08-22 20:02:21,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 20:02:21,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:02:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 20:02:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 20:02:21,921 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 39 states. [2020-08-22 20:02:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:28,596 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-22 20:02:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 20:02:28,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-08-22 20:02:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:28,598 INFO L225 Difference]: With dead ends: 111 [2020-08-22 20:02:28,598 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 20:02:28,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=402, Invalid=4854, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 20:02:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 20:02:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-08-22 20:02:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 20:02:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-08-22 20:02:28,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-08-22 20:02:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:28,631 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-08-22 20:02:28,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 20:02:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-08-22 20:02:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 20:02:28,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:28,633 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:28,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 20:02:28,633 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1449876555, now seen corresponding path program 21 times [2020-08-22 20:02:28,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:28,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678008760] [2020-08-22 20:02:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:28,641 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:03:50,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:03:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:03:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:03:50,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678008760] [2020-08-22 20:03:50,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:03:50,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 20:03:50,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390793133] [2020-08-22 20:03:50,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 20:03:50,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:03:50,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 20:03:50,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=329, Unknown=36, NotChecked=0, Total=420 [2020-08-22 20:03:50,147 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 21 states. [2020-08-22 20:04:00,119 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2020-08-22 20:04:20,593 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0)))) (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) .cse0) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse3 (div c_main_~l~0 4294967296))) (let ((.cse2 (* .cse3 (- 4294967296)))) (let ((.cse1 (div (+ c_main_~l~0 .cse2) 3))) (+ (* 25769803776 .cse1) (* 36893488151714070528 (div (+ (* .cse1 (- 3)) c_main_~l~0 .cse2) 4294967296)) c_main_~n~0 (* 36893488151714070528 .cse3) 8569934604)))) .cse0))) is different from false